СПОСОБ РАЗМЕЩЕНИЯ В КУЧАХ ХВОСТОВ, ПРОИСХОДЯЩИХ ОТ СПОСОБА ПЕРЕРАБОТКИ ЖЕЛЕЗНОЙ РУДЫ

Изобретение относится к способу размещения в кучах, вместо дамб, хвостов, производимых способом переработки железной руды, который содержит этапы сгущения ультратонких хвостов, сгущения песчаных хвостов, смешивания данных хвостов в пропорции 80-90 мас.% песчаных хвостов и 10-20 мас.% ультратонких хвостов, добавления коагулянта, добавления флокулянта, фильтрации данной смеси и сваливания отфильтрованных хвостов. Обеспечивается возможность использования изобретения на любом заводе концентрирования железной руды без необходимости каких-либо изменений в схеме способа. 7 з.п. ф-лы, 13 ил., 3 табл., 1 пр.

СПОСОБ ДИСПЕРГИРОВАНИЯ И АГРЕГИРОВАНИЯ МИНЕРАЛЬНЫХ ШЛАМОВ

Группа изобретений может быть использована в горнодобывающей промышленности для облегчения агрегирования минеральных компонентов в водных минеральных шламах. Обработка водного минерального шлама включает добавление в диспергированный шлам водного раствора анионного полимера, вступающего в реакцию с твердыми минеральными компонентами, с целью их агрегирования и осаждения с образованием продукта, содержащего флоккулированный осадок и воду. При этом полимер является водорастворимым, анионным диакрилатным сополимером, содержащим мультивалентный катион, выбранный из группы: кальций, магний, железо и алюминий, и обладающим характеристической вязкостью менее 5 дл/г, измеренной в 1М NaCl при 25°С. Дополнительно в обрабатываемый шлам добавляют натриевый или калиевый цеолит с массовым соотношением алюминия и кремния от 0,72:1 до 1,3:1, в количестве, достаточном для диспергирования и разделения компонентов шлама. Полимер нейтрализует дисперсионный эффект цеолита, вызывает агрегирование и осаждение ...

СПОСОБ СУШКИ ШЛАМА

Изобретение относится к способу сушки шламов. Способ включает в себя предварительную обработку и смешивание исходных материалов, формирование и нагревание конгломератов шлама, сушку сформированных конгломератов шлама и извлечение энергии, дополнительную обработку, сортировку частиц продукта и промежуточное хранение конечного продукта. Предварительно обработанный шлам подают в технологическое устройство, в котором шлам формуют в конгломераты шлама соответствующего размера, повышают температуру технологического устройства. Энергия, поглощаемая в технологическом устройстве, передается конгломератам шлама, подвергаемым формованию. Сформированные конгломераты шлама подают в сушилку, в которой они движутся навстречу потоку осушающего воздуха, температура которого значительно ниже температуры конгломератов шлама, подвергаемых сушке. Изобретение обеспечивает энергетически эффективный способ для сушки шламов. 5 з.п. ф-лы, 3 ил.

Способ получения железного купороса из осадка от очистки хромсодержащих сточных вод

Изобретение относится к переработке железосодержащих отходов химической промышленности, а именно к способу получения железного купороса из осадка от очистки хромсодержащих сточных вод. Исходное сырье, содержащее соединение железа (III), растворяют в избытке серной кислоты, вводят в полученный раствор металлическое железо, после чего раствор подвергают фильтрации и охлаждают до выпадения кристаллов железного купороса. В качестве исходного сырья используют осадок от реагентной очистки хромсодержащих сточных вод, который включает в себя соединение хрома (III), соединение кальция (II), гидроксид железа (III) в качестве соединения железа и находится в мелкодисперсном состоянии. Выделившиеся кристаллы железного купороса отделяют центрифугированием, при этом маточный раствор, полученный при центрифугировании раствора, упаривают и охлаждают до выпадения второй порции кристаллов железного купороса. Способ позволяет расширить сырьевую базу для получения железного купороса. 3 з.п. ф-лы, 2 пр.

СПОСОБ ОЧИСТКИ ВОДЫ

Изобретение может быть использовано в химической промышленности и водоочистке. Прореагировавший на поверхности содержащий карбонат кальция минеральный материал и/или прореагировавший на поверхности осажденный карбонат кальции покрывают по меньшей мере одним анионным полимером с плотностью общего отрицательного заряда в пределах от 1 мкэкв/г до 15000 мкэкв/г. Полученный содержащий карбонат кальция материал с поверхностным покрытием используют для очистки воды, обезвоживания осадков или взвешенных отложений. Заявленная группа изобретений обеспечивает повышение эффективности флокуляции, способствует обезвоживанию или фильтрации осадков или взвешенных отложений. 5 н. и 16 з.п. ф-лы, 3 табл., 7 пр.

СПОСОБ ОБЕЗВРЕЖИВАНИЯ МЕХАНИЧЕСКИ ОБЕЗВОЖЕННЫХ ОСАДКОВ СТОЧНЫХ ВОД

Группа изобретений может быть использована в области переработки осадков сточных вод для снижения класса опасности механически обезвоженных осадков при их последующей утилизации. Технология способа включает приготовление смеси из адсорбента и инертного материала, смешивание активной смеси и механически обезвоженных осадков сточных вод, и подсушивание смеси до влажности 0-20% с получением конечной смеси. В качестве адсорбента используют акваионит, при этом масса адсорбента составляет не менее 3% от абсолютно сухой массы механически обезвоженных осадков сточных вод. В качестве инертного материала используют песок, при этом масса инертного материала составляет 15-450% от массы механически обезвоженных осадков сточных вод. Обработка каменистых включений инертного материала включает определение влажности инертного материала, дробление каменистых включений и их просеивание. В некоторых вариантах способа в качестве инертного материала используют сухой или влажный песок, к активной смеси добавляют ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ОБЕЗВОЖИВАНИЯ ШЛАМА НА ФИЛЬТРОВАЛЬНОЙ СЕТКЕ

СИСТЕМА И СПОСОБ ОБРАБОТКИ ОТХОДОВ

... 1. Способ удаления воды из осадка, содержащий этапы, на которых:смешивают осадок и, по меньшей мере, один смешивающийся материал так, что смешивающийся материал распределяется, по существу, равномерно во всем осадке, для образования смеси, исжимают смесь осадка и смешивающегося материала,причем смешивающийся материал состоит из жестких частиц.2. Способ по п.1, в котором смешивающийся материал состоит из частиц, имеющих, по меньшей мере, один угловатый острый край.3. Способ по п.1, в котором смешивающийся материал, по меньшей мере, частично состоит из, по меньшей мере, одного из: частиц угля, частиц золы, песка, сухого осадка железа, сухого осадка алюминия и металлических стружек.4. Способ по п.1, в котором средний размер частицы смешивающегося материала имеет значение между 2 и 1000 мкм.5. Способ по п.4, в котором средний размер частицы смешивающегося материала имеет значение между 50 и 500 мкм.6. Способ по п.1, в котором частицы являются абразивными.7. Способ по п.1, в котором массовое ...

ПОВЕРХНОСТНО-ОБРАБОТАННЫЙ КАРБОНАТ КАЛЬЦИЯ И ЕГО ПРИМЕНЕНИЕ ДЛЯ ОЧИСТКИ ВОДЫ И ДЛЯ ОСУШЕНИЯ ИЛА И ОСАДКОВ

Изобретение относится к водоочистке. Предложен способ очистки воды и/или осушения ила и/или осадков, который включает обеспечение очищаемого объекта, содержащего примеси; и обеспечение поверхностно-обработанного карбоната кальция, в котором, по меньшей мере, 1% доступной площади его поверхности содержит покрытие, содержащее, по меньшей мере, один катионный полимер. Далее осуществляют контакт подготовленных компонентов для получения композитного материала из поверхностно-обработанного карбоната кальция и примесей, в котором частицы карбоната кальция, по меньшей мере, одного поверхностно-обработанного карбоната кальция имеют величину средневзвешенного диаметра частиц dот 0,01 мкм до 250 мкм, и/или частицы карбоната кальция, по меньшей мере, одного поверхностно-обработанного карбоната кальция имеют удельную площадь поверхности от 1 до 250 м/г. При этом катионный полимер имеет плотность положительного заряда в интервале от 1 мэкв/г до 15 мэкв/г, и/или в катионном полимере, по меньшей мере, ...

СПОСОБ ОБРАБОТКИ СТОЧНЫХ ВОД

VERFAHREN UND GERAET FUER DIE VERFESTIGUNG VON FLUESSIGEN SCHLAEMMEN

Improved process for treatment of minewater

METHOD OF AND APPARATUS FOR COMPACTING FLUID SLUDGE

... 1444760 Sludge stirring and settling apparatus SOC GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES ALSTHOM 28 Nov 1973 [28 Nov 1972] 55295/ 73 Headings B1C and B1D Sewage sludge is concentrated in a vessel 5 having a sludge inlet 1, 3, 4, with a branch 2 feeding a flocculant, a clear liquid overflow 10, 11 and a rotary assembly o fperforate blades 7, which stir and agglomerate the flocculated sludge, and a perforate screw 12, which compresses the sludge particles and forces them through outlet 13. In Fig. 1 blades 7 and screw 12 rotate on a common shaft. In Fig. 2 (not shown) concentric shafts enable screw 12 to rotate slower than blades 12, and four sets of blades, screws and sludge outlets are provided in one vessel. Plate 19 is vertically adjustable to maintain a body of compacted sludge in outlet 13. Level sensors 6, 16 control the crosssection of outlet 13, the speed of screw 12 and the delivery of sludge to inlet 1 to maintain the level in the vessel between upper and lower limits ...

An improved waste treatment system

A system for removing water from sludge is disclosed. The system (100) includes: de-watering (102) sludge comprising an output from a wastewater treatment system to form a semi-solid sludge cake; dispensing (104) the sludge in a sludge hopper and dispensing a blending material in a recipient blending material hopper; depositing (106) the sludge and the blending material in a mixing device; mixing (108) the sludge and the blending material having a porous structure in a weight ratio of the sludge to the blending material of about from 2: 1 to about 10:1; and compressing (110) the sludge and the blending material to release moisture. Advantageously, the system (100) provides an improved method of de-watering sludge, for more efficient processing, transporting and recycling, depending on the application.

Concentration and dewatering of suspensions

Improved process for treatment of minewater

A process for the treatment of mine water comprises dosing and adjusting the pH of the mine water to allow the precipitation of contaminants, and employs a siphon 1 and an aeration tank 7 which lacks physical mixing means. Ideally, the aeration tank comprises a bubble diffuser and media 17 to enable microbial growth, and is heated. Ideally, the system is sealed and pumps are used to prime the system such that the siphon or natural static head transfers the water from a source to a junction tank 3. Preferably, water and sludge are mixed 2 before being transferred to a junction tank. Water is pumped from the junction tank to an aeration tank and returned back to the junction tank wherein during the transfer additives 18 are added to the water. The treated mixture is transferred from the junction tank to hydrocyclones 11 for separating the solids from the water. The water is discharged and the separated solids are dewatered and either discharged or recycled back into the process. A mine water ...

SEWAGE TREATMENT UNIT

... 1318103 Treating sewage D J N LIGHT and J DEVRIES 14 April 1970 [29 Oct 1969] 17698/70 Heading C1C Raw sewage flows into an aerating and holding tank 1 via inlet 2 and is strained at 4 before flowing over a series of inclined baffles 3 whereby it is aerated. Air is admitted at 8 into tank 1 and the sewage is continually recirculated by pump 5. A conveyer belt 9 removes aerated sewage at a constant rate from tank 1 by means of a plurality of buckets 10 which empty upon the upper of a series of inclined baffles 13 which mix the sewage in blender tank 5 with a coagulant or flocculant metered by pump 14. The resultant mixture flows via pipe 15 to a web of filter paper 16 in which a depression is formed to receive the mixture. The filter paper is fed from a supply roll 18 to a take-up roll 19 by a motor 20 which advances a fresh area of paper beneath the outlet of pipe 15 in response to a device which detects the level of unfiltered mixture on the paper. The filtered liquid then passes to a ...

Rehabilitation method

Suppresion of dust

Suppression of dust

Rehabilitation method

Suppresion of dust

Rehabilitation method

Rehabilitation method

Suppresion of dust

MECHANISM AND PROCEDURE FOR THE RECYCLING OF TURNING PROPERTY, WASTES FROM WATER PURIFICATION DEVICES AND SUCH A THING

VERFAHREN ZUR HERSTELLUNG EINES VEREDELUNGSPRODUKTES AUS KLAERSCHLAEMMEN

VERFAHREN ZUR VERBESSERUNG DER MECHANISCHEN ENTWAESSERBARKEIT VON SCHLAEMMEN

PROCEDURE FOR DRAINING CLARIFYING DREDGING AND FROM THIS DRAINED CLARIFY-DREDGES

PROCEDURE FOR THE PROCESSING OF MUD

SUPPRESSION OF DUST

PROCEDURE FOR THE IMPROVEMENT OF THE MECHANICAL ENTWAESSERBARKEIT OF DREDGING

PROCEDURE AND DEVICE FOR THE REDUCTION OF PATHOGENEN IN WASTES.

VERFAHREN UND VORRICHTUNG ZUM ENTWÄSSERN VON SCHLÄMMEN, INSBESONDERE VON KLÄRSCHLÄMMEN

DEVICE FOR THICKENING OR DRAINING DREDGING, IN PARTICULAR SURPLUS DREDGING IN PURIFICATION PLANTS

THICKENING OF AQUEOUS MINERAL SUSPENSIONS

PROCEDURE FOR CHANGING THE CONSISTENCY OF A MUD

STABILIZED LIQUID LIME DISPERSION FOR WASTE WATER TREATMENT

PROCEDURE AND DEVICE FOR THE TREATMENT OF SEWAGE SLUDGE

Drainage device

PROCEDURE FOR THE CONDITIONING OF MANUFACTURER DREDGING, IN PARTICULAR CLARIFYING DREDGING

Alternative additives to enhance slurry dewatering

Abstract The invention provides methods and compositions for improving dewatering of mineral slurry. The method comprises adding an R-Succinic 5 Compound (such as octadecenyl succinic acid, hexadecenyl succinic acid, and/or dodecenyl succinic acid) to the slurry. The R-Succinic Compound removes water that would otherwise be trapped within the filtered slurry cake.

Dewatering systems and methods

A dewatering system (100) for removing solids from an influent includes a filtration assembly (106) and a feed pipe (104) upstream thereof. The dewatering system includes a solids receptacle (114) downstream of the filtration assembly (106), and an effluent collector (116) adjacent to the filtration assembly (106) and in fluid communication with the filtration assembly (106). The dewatering system (100) includes a sensor (118a-h) to sense a characteristic of an influent, an effluent and/or a solid. A control system (120) is operatively connected to the sensor (118a-h) to receive a sensor signal therefrom and to generate an adjustment signal based on the sensor signal to improve the efficiency of the dewatering system (100).

A process for treating wastewater comprising treating sludge with hydrolytic enzymes

Methods are provided for reducing or eliminating the amount of exogenous carbon sources added to wastewater or sludge thereof by the addition of a hydrolytic enzyme to primary or secondary sludge of wastewater wherein said hydrolytic enzyme enhances the hydrolysis and subsequent fermentation of the sludge, thereby generating more carbon sources in situ.

Dewatering process

Method for separating liquid from suspended matter in a sludge and device for same

The invention relates to a method for separating the liquid part from the suspended matter in a sludge supplied in a continuous flow at a flow rate of Q ...

Waste material process and product

... 26A method of producing a final product from a wastewater dissolved air flotation (DAF) sludge which includes the following dewatering step: 5 - dewatering of the sludge, an aged sludge or a pre-processed sludge to produce a sludge filter cake and a filtrate; such that the pre-processed is sludge, or aged sludge, that has undergone additional processing steps prior to dewatering and aged sludge is sludge that has been stored for a period of time, wherein the dewatering step is a mechanical dewatering step 10 carried out at a maximum of 30°C which results in a sludge filter cake that does not flow under its own mass.

Method of removing sulphate from waste water

The invention relates to a method and apparatus of removing sulphate, calcium and/or other soluble metals from waste water wherein NaOH and AI(OH) ...

Alternative additives to enhance slurry dewatering

The invention provides methods and compositions for improving dewatering of mineral slurry. The method comprises adding an R-Succinic Compound (such as octadecenyl succinic acid, hexadecenyl succinic acid, and/or dodecenyl succinic acid) to the slurry. The R-Succinic Compound removes water that would otherwise be trapped within the filtered slurry cake.

Method for treating mineral sludge by flocculation in-line then above ground

The invention relates to an improved method for treating sludge by flocculation, according to which: the sludge to be treated is transported in a pipe; at least one flocculation agent is then injected into the pipe transporting the sludge to be treated; the sludge is then mixed with said flocculation agent; and, finally, the resulting mixture is transported and then discharged in a natural or artificial excavation, at a smaller distance from the bottom of said excavation than the depth thereof.

Anaerobic treatment method and device

The purpose of the present invention is to provide an anaerobic processing method and a device, whereby: an anaerobic digestion device can be made more compact; the generation of phosphorous, siloxane, and other precipitates is reduced; sludge generated at wastewater processing facilities, etc., is stably and efficiently anaerobically digested; biogas (especially methane gas) can be efficiently recovered; digested sludge can be efficiently dewatered; and cost is reduced. Provided is an anaerobic processing method that includes: a preprocessing step that solid/liquid separates a coagulated sludge, which is prepared by adding a coagulant to sludge, into a sludge concentrate with a sludge concentration of 4-12% and a separated liquid; an anaerobic digestion step that anaerobically digests the sludge concentrate and also recovers biogas; a step for preparing a digested sludge coagulant by mixing a coagulant and at least one of either the separated liquid and water, with the anaerobically digested ...

Method of deodorizing sludge and device for performing said method

The invention concerns a method and device for the continuous treatment of a flow of organic liquid sludge. Following the optional addition of granular mineral matter to the flow, the sludge (5) is injected at a rate q into a column of air which is at overpressure relative to atmospheric pressure, the air column circulating at a rate Q > 5q in a chamber (2, 4) extending over a specific length L along a longitudinal axis (3), in order to create a fluidized bed, in which the sludge is aerolized, between air supply piping upstream of the sludge injection and an outlet reservoir or duct downstream of the resulting fluidized bed, the duct or reservoir being at atmospheric pressure or substantially at atmospheric pressure, and a flocculant (21) is introduced continuously downstream of the chamber into the fluidized bed in order to aggregate the organic matter before the solid part obtained in this way is separated from the liquid part, the resulting solid part thus being deodorized.

Method of deodorizing sludge and device for performing said method

The invention concerns a method and device for the continuous treatment of a flow of organic liquid sludge. Following the optional addition of granular mineral matter to the flow, the sludge (5) is injected at a rate q into a column of air which is at overpressure relative to atmospheric pressure, the air column circulating at a rate Q > 5q in a chamber (2, 4) extending over a specific length L along a longitudinal axis (3), in order to create a fluidized bed, in which the sludge is aerolized, between air supply piping upstream of the sludge injection and an outlet reservoir or duct downstream of the resulting fluidized bed, the duct or reservoir being at atmospheric pressure or substantially at atmospheric pressure, and a flocculant (21) is introduced continuously downstream of the chamber into the fluidized bed in order to aggregate the organic matter before the solid part obtained in this way is separated from the liquid part, the resulting solid part thus being deodorized.

Multivalent cation-containing copolymer, process for production thereof and use thereof to treating aqueous dispersions

There is disclosed a multivalent cation containing copolymer derived from one or more ethylenically unsaturated acids. The copolymer has the following characteristics: (a) an intrinsic viscosity of at least about 3 dl/g when measured in 1 M Na Cl solution at 25°C; (b) the copolymer is derived from a monomer mixture comprising an ethylenically unsaturated acid and at least one comonomer, the ethylenically unsaturated acid present in an amount in the range of from about % to about 65% by weight; and (c) a residual comonomer content is less than 1000 ppm when the comonomer is an acrylamide. The copolymer, inter alia, is useful as a flocculant for treating an aqueous slurry comprising particulate material, preferably tailings from a mining operation.

APPARATUS AND METHOD FOR MANURE RECLAMATION

An improved system (100) for processing a liquid manure and producing organic fertilizer includes equipment (101) for separating various components of the liquid manure having different nitrogen to phosphorous ratios and equipment (120) for mixing these components so as to produce an organic fertilizer with a predetermined nitrogen to phosphorus ratio. The system (100) includes equipment (106) for separating a first manure component A that contains about 15 percent soluble phosphorus and about 20 percent soluble nitrogen, equipment (107) for adding a flocculant material to the liquid manure aqueous solution, equipment (108) for separating a second manure component B that contains about 40 percent partially soluble phosphorus and about 30 percent partially soluble nitrogen, equipment (110) for performing direct current electrocoagulation cleaning of the liquid manure aqueous solution and separating a third manure component C that contains about 45 non- soluble phosphorus and about 10 percent ...

HOG MANURE TREATMENT SYSTEM

The invention relates to a method of treating manure such that odour from the manure is significantly reduced or eliminated and producing therefrom recyclable water, value-added biosolids and ammonia. Specifically, the manure is combined with lime at high pH. The material is mixed under negative pressure and the basic conditions cause ammonia to be evolved from the manure which is then drawn off and recovered. A coagulating agent is then added which further promotes floc formation within the manure. Following further mixing, flocs are separated from the liquid portion. A struvite-promoting chemical and a coagulant are then added to the liquid portion which causes further floc formation, and the flocs are again separated from the substantially clear liquid. It is of note that as a result of this process, the solids are highly hydrophobic and dry very quickly. It is of further note that solids isolated from either step can be combined and sold, for example, as fertilizer, as discussed below ...

TREATING SEWAGE OR LIKE SLUDGE

METHOD FOR TREATING BIO-ORGANIC AND WASTEWATER SLUDGES

An improved process of treating sludge to provide a stable product for use as a beneficial soil or fertilizer for agricultural lands which includes the steps of: (a) mixing sludge with at least one alkaline material in an amount sufficient to raise pH of the mixture to a level of at least 12 and to increase percent solids in the mixture to at least 40% by weight, and such that odorant sludge organics and inorganics are bound to adsorbent particles of the alkaline material, (b) aerating and drying the mixture by agitation and heating to stabilize the mixture and increase the percent solids to at least 50% by weight, and (c) pasteurizing the dried mixture at a temperature at or above 52. degree. C. by application of heat resulting from an exothermic reaction of the alkaline material with water in the sludge, wherein said step (b) is carried out in a mechanical means selected from the group consisting of a drum dryer, a pelletizer, and a fluidized bed apparatus, and wherein the heat applied ...

METHOD FOR TREATMENT OF OIL SANDS TAILINGS WITH LIME OR WITH LIME AND CARBON DIOXIDE

The present invention relates to the treatment of oil sands tailings with CaO lime or with CaO lime and CO2, to achieve improved non-segregating consolidation of the solids in the tailings, and to recover the release water with acceptable chemical properties for its use in the bitumen extraction process. Non-segregating tailings are produced from the blend of cyclone underflow and thickener underflow, or from the blend of cyclone underflow, thickener underflow, and mature fine tails, by treating the tailings mix with CaO or CaO and CO2 at proper dosages, with the resultant simultaneous production of release water having lower concentrations of Ca2+, Mg2+, Na+, Cl- ions, ultra fines, and color- making organic species concentrations.

ELECTROCHEMICAL STABILIZATION AND PRECONDITIONING PROCESS FOR MUNICIPAL AND INDUSTRIAL SLUDGE

Procédé de conditionnement de boues d'épuration caractérisé en ce qu'il comprend les étapes suivantes : acidification des boues d'épuration de manière à atteindre un pH entre environ 3,5 et environ 5 pour générer des boues acidifiées; électrolyse des boues acidifiées dans une cellule électrolytique comprenant des électrodes dont au moins une anode et au moins une cathode, la cellule étant capable de générer in situ un oxydant bactéricide choisi parmi l'acide hypochloreux et l'acide persulfurique, pour générer des boues électrolysées, les boues électrolysées ayant une déshydratabilité et une stabilité plus élevée que les boues d'épuration.

INTEGRATED UTILITY SYSTEM

An integrated utility system (10) comprising; i) a power supply (12); and ii) a wastewater treatment system (20), wherein waste energy from the power supply (12) is utilised in the wastewater treatment system (20).

PROCESS FOR THE DEWATERING OF AQUEOUS SUSPENSIONS

A process of dewatering an aqueous suspension comprising treating the suspension with a dewatering amount of a reverse phase polymer, and subjecting the suspension to a mechanical dewatering to form a cake, characterised in that the reverse phase polymer only partially inverts to bring about flocculation and thickening of the suspension, and then fully inverts during the further dewatering to form a cake.

OIL-BASED SLUDGE SEPARATION AND TREATMENT SYSTEM

An apparatus for treating oil-based sludge includes a boiler, a heat exchanger having a circulatory steam path in fluid communication with the boiler and a sludge path receiving sludge, a plurality of serially- aligned mixers in fluid communication with the sludge path of the heat exchanger, a separation tank in fluid communication with the plurality of mixers, and wherein the separation tank includes a tank having a plurality of walls, a hydrocyclone mounted within the tank receiving sludge from the plurality of mixers, wherein the hydrocyclone includes a solids outlet directing a solids component towards a bottom portion of the tank and a fluid outlet directing a fluid component into the tank, a means for conveying separated solids along the bottom portion of the tank to a solids outlet, and a plurality of fluid outlets vertically located along a tank wall, wherein each outlet includes a valve providing selective fluid communication from the tank.

METHOD FOR RECOVERY OF PHOSPHATE

The present invention provides a method for recovery of phosphate, in the form of magnesium ammonium phosphate (MAP), from a process for treating a biomass material which process comprises a digestion step performed in a digestion tank and includes a pre-treatment step employing a thermal hydrolysis, characterised in that a magnesium source is added to the material in the process flow before said flow enters the digestion tank, and phosphate is recovered as MAP as an integral part of a solid or semi-solid digestate product from the digestion tank.

METHODS FOR CONTROLLING IGNITABILITY OF ORGANIC WASTE WITH MINERAL BY-PRODUCTS

Methods and systems for treating organic waste, which include determining the ignition threshold temperature for the organic waste and at least one mineral by-product, selecting a ratio of organic waste:mineral by-product(s) based on the determined ignition threshold temperature, combining the mineral by- product(s) with the organic waste, so as to arrive at a mixture having the selected ratio of organic waste:mineral by product(s); and drying the mixture of organic waste and mineral by-product(s) to produce organic waste solids. The treatment methods of the present invention are methods of stabilizing the treated organic waste so as to control the tendency of the organic waste to ignite. Also provided are organic waste solids formed by the methods of the present invention.

PROCESSING PAINT SLUDGE TO PRODUCE A COMBUSTIBLE FUEL PRODUCT

A method for producing a combustion product that involves dewatering raw paint sludge from spray paint booth operations. The resulting material can provide significant and economical fuel value to combustion processes such as for power plants while also obviating the need to dispose of waste paint sludge in landfills. Additionally the process is inexpensive, safe and free of most problems associated with paint sludge drying.

METHOD COMPRISING SEPARATION AND HIGH VOLTAGE PULSE TREATMENT BEFORE DIGESTION OR FURTHER PURIFICATION

The present invention describes a method of treatment of at least one phase, solid and/or liquid, of a pumpable liquid flow, wherein the method comprises first filtration for separation of a liquid phase from the pumpable liquid flow, for obtaining one flow with increased content of solid phase and one flow with increased liquid level; and thereafter treatment of the flow with increased content of solid phase with high voltage pulses in a PEF-unit. Furthermore, the present invention is also related to a system for treatment of at least one phase, solid and/or liquid, of a pumpable liquid flow and the use of such a system, such as use for the treatment of at least one phase, solid and/or liquid, of a pumpable liquid foodstuff or a ballast water flow, or as a pre-treatment before digestion. Furthermore, the present invention also refers to a method of treatment of at least one phase, solid and/or liquid, of a pumpable liquid flow, wherein the method comprises hygienization of at least a part ...

METHOD FOR CONTROLLING RAPID STIRRER, AND RAPID STIRRER

Provided is a rapid stirrer 10 for stirring sludge and a coagulant using a stirring blade 17 within a tank, wherein the speed of the stirring blade 17 is increased at a set rate as the charged amount of sludge increases, the speed of the stirring blade 17 is reduced at a set rate as the charged amount of sludge decreases, and aggregated floc having a fixed floc diameter is stably produced even when there is a change in the operating conditions under which the charged amount of sludge increases and decreases.

MULTIVALENT CATION-CONTAINING COPOLYMER, PROCESS FOR PRODUCTION THEREOF AND USE THEREOF TO TREATING AQUEOUS DISPERSIONS

There is disclosed a multivalent cation containing copolymer derived from one or more ethylenically unsaturated acids. The copolymer has the following characteristics: (a) an intrinsic viscosity of at least about 3 dl/g when measured in 1 M NaCl solution at 25°C; (b) the copolymer is derived from a monomer mixture comprising an ethylenically unsaturated acid and at least one comonomer, the ethylenically unsaturated acid present in an amount in the range of from about 5% to about 65% by weight; and (c) a residual comonomer content is less than 1000 ppm when the comonomer is an acrylamide. The copolymer, inter alia, is useful as a flocculant for treating an aqueous slurry comprising particulate material, preferably tailings from a mining operation.

SLUDGE PROCESSING SYSTEM AND STORAGE MEDIUM STORING A PROGRAM FOR CONTROLLING AN OPERATION OF A SLUDGE PROCESSING SYSTEM THEREON

The object of the present invention is to provide a sludge processing system having a centrifugal separator which concentrates the sludge and a furnace which heat-treats the concentrated sludge, and allows the automatic control in which the operational condition of the centrifugal separator is set to the optimal condition in accordance with the operational state of the furnace. The control device sets a variable range of a differential speed between the bowl and the screw conveyor of the centrifugal separator, and performs a variable control of the differential speed so that the concentrated sludge convey torque of the screw conveyor achieves a torque corresponding to a moisture content requested by the furnace within the variable range, when the differential speed varies within a certain range being previously set and the concentrated sludge convey torque of the screw conveyor maintains the torque corresponding to the moisture content requested by the furnace for a certain period of time ...

SURFACE -TREATED CALCIUM CARBONATE AND ITS USE IN WATER PURIFICATION AND FOR THE DEWATERING OF SLUDGES AND SEDIMENTS

The invention relates to a process for the purification of water and/or dewatering of sludges and/or sediments, to the use of a surface-treated calcium carbonate for water purification and/or dewatering of sludges and/or sediments, as well as to the use of a surface-treated calcium carbonate for reducing the amount of polymeric flocculation aids in water and/or sludges and/or sediments and to a composite material comprising a surface-treated calcium carbonate and impurities originated from different sources obtainable by said process.

PROCESS AND APPARATUS FOR PATHOGEN REDUCTION IN WASTE

A process for pathogen reduction in waste where dewatered sludge having a solids content in the range of 10-60 % is mixed within a conveyor (10) with calcium oxide or calcium carbonate. Hydration to calcium hydroxide occurs with an attendant release of heat. The pH of the sludge is then elevated and the heat of the hydration reaction is retained resulting in effective neutralization of pathogens. The conveyor (10) is provided with an internal screw (20) driven by Shaft (22) and also with heat elements (11) and outer insulation (12).

CONTAINER FOR DEWATERING OR PACKAGING AND TRANSPORTATION

TITLE: CONTAINER FOR DEWATERING OR PACKAGING AND TRANSPORTATION A container for dewatering or packaging and transportation comprising a external net-like container provided with a hanging member at an upper portion thereof and an easy-to-open-and-shut closure at a bottom portion thereof, and an internal cloth container for dewatering a wet mixture or for packaging a powdery or granular substance, whereby dewatering or packaging, transporting and storing operations can be very easily achieved.

METHOD OF TREATING WASTE SLUDGE

A waste sludge treatment process, in which a solid additive (2a, 2b) is mixed into sludge (1) introduced into said process, and the resulting mixture is further treated (4-12) to produce solid products (11), is characterized in that the solid additive includes aggregate-like hydrophobic grains of peat, which may make up at least one half of the solid additive. The mixture is further treated advantageously by means of extrusion (6), using a method that makes it possible to remove water extracted from the extruded material. The produced particles are hardened and made hygienic by essentially preventing bacterial action within them. For this reason, the particles are coated with a coating formed by a mixture of lime and water on ash and water.

PROCESS AND APPARATUS FOR LIQUID SLUDGE STABILIZATION

Cette invention concerne un procédé et un appareil de traitement des boues. Ledit procédé consiste à alimenter une cuve de réacteur (20) de préférence sensiblement fermée avec de la boue (34) à l'état sensiblement liquide et un additif alcalin (29), à mélanger la boue et l'additif pour être sûr que le PH soit supérieur à 12 environ, à maintenir constante la valeur du PH pendant une durée préétablie, à apporter éventuellement au moyen d'éléments chauffants (40) un supplément de chaleur au mélange de boue (34) dans la cuve du réacteur jusqu'à l'obtention d'une température élevée préétablie, pendant une durée préétablie, à maintenir le mélange de boue (34) dans un état sensiblement liquide et à évacuer le mélange de boue (34) et d'additif de la cuve du réacteur (20) dans un état sensiblement liquide et tel que la boue se prête à subir un écoulement par gravité.

DEWATERING OF AQUEOUS SUSPENSIONS

Belt pressing or other pressure dewatering of a high solids mineral suspension is facilitated by flocculating the suspension by mixing into the suspension anionic flocculant having IV at least 5 dl/g and a minor amount of a cationic flocculant which generally has IV at least 4 dl/g. The flocculants are normally such that counterionic precipitation occurs.

Verfahren zur Entwässerung von Klärschlamm

Entwässerungsvorrichtung

Procedure for the treatment of an aqueous rock mud, in particular a mud from tunnel construction measures.

Bei der Behandlung eines wässrigen Gesteinsschlamms, insbesondere eines Schlamms aus Tunnelbaumassnahmen, wird der Gesteinsschlamm entwässert. Dabei ist vorgesehen, dass der Gesteinsschlamm durch Zugabe eines aushärtenden Bindemittels, zum Beispiel eines Zements, vorbehandelt wird, das innerhalb einer vorgegebenen Warte- oder Reaktionszeit zumindest teilweise abbindet und zumindest teilweise aushärtet, woraufhin der so vorbehandelte Gesteinsschlamm zu einem Baustoff weiterverarbeitet wird.

TREATMENT SYSTEM FOR EX-SITU CARBONIZATION AND SOLIDIFICATION OF SILT SOIL USING ACTIVE MAGNESIUM OXIDE AND METHOD THEREOF

Die vorliegende Erfindung offenbart ein Verfahren zur Ex-situ-Karbonisierung und -Verfestigung eines Schluffbodens mittels aktiven Magnesiumoxids und gehört zu dem Bereich von Wasser- und Tiefbau. Ein derartiges Verfahren umfasst die Schritte Vorbehandlung des Schluffs, Durchmischen eines Verfestigungsmittels, Schluffgranulation, Karbonisierung mit Kohlendioxid, Sammlung von Abfallflüssigkeit/Abgas und Recycling. Dabei werden eine völlige Durchmischung des Schluffs mit einem Verfestigungsmittel und eine schnelle Karbonisierung mittels von Magnesiumoxid verfestigter Schluffkörner durch Anpassen der Zufuhrmenge des Verfestigungsmittels anhand des gemessenen Wassergehalts und Anpassen der Korngrösse und des Kohlendioxid-Drucks anhand der Bodeneigenschaft erzielt. Bei einem derartigen Arbeitsvorgang werden Schmutz und Kohlendioxid aufgenommen, womit eine Sekundärverschmutzung vermieden wird. Ein derartiges Verfahren zeichnet sich durch hohe Sicherheit und Einfachheit, geringe Kohlenstoffemission ...

ECOLOGICALLY STABLE CEMENT COMPOSITION, ITS APPLICATION FOR NEUTRALIZATION OF BOTTOM DEPOSITS/SLUDGE DREDGING, CORRESPONDING METHOD AND DEVICE FOR NEUTRALIZATION OF THE

DEVICE AND METHOD FOR FLOCCULATION FRACTION OF SOLID PARTICLES MIXTURE OF SOLID SUBSTANCE AND LIQUID STI

METHOD AND DEVICE FOR TREATMENT OF LIQUID MUD AND BRIQUETTES FROM MUD, PRODUCED BY THIS METHOD

СИСТЕМА РАЗДЕЛЕНИЯ И ОБРАБОТКИ НЕФТЕСОДЕРЖАЩЕГО ГРЯЗЕВОГО ОТСТОЯ

Устройство для обработки нефтесодержащего грязевого отстоя включает в себя котел, теплообменник, содержащий циркуляционный паровой тракт, сообщенный с котлом, и тракт грязевого отстоя, принимающий грязевой отстой, множество последовательно расположенных смесителей, сообщенных с трактом грязевого отстоя теплообменника, разделительный резервуар, сообщенный с множеством смесителей и включающий в себя резервуар, имеющий множество стенок, гидроциклон, установленный внутри резервуара, принимающий грязевой отстой из множества смесителей и включающий в себя выпускное отверстие твердой фазы, направляющее компонент твердой фазы по направлению к нижней части резервуара, и выпускное отверстие жидкой фазы, направляющее компонент жидкой фазы в резервуар, средство для перемещения отделенной твердой фазы вдоль нижней части резервуара к выпускному отверстию твердой фазы и множество выпускных отверстий жидкой фазы, расположенных вертикально вдоль стенки резервуара и включающих, каждое, клапан, обеспечивающий ...

СИСТЕМА ДЛЯ ОТДЕЛЕНИЯ ТВЕРДЫХ ЧАСТИЦ ОТ БУРОВОГО РАСТВОРА

Система для отделения твердых частиц от бурового раствора содержит установленные на передвижной платформе подающий механизм для сухого флокулянта, резервуар для выдерживания, полидуктор, расположенный между подающим механизмом и резервуаром для выдерживания, и насос для раствора флоккулянта, сообщенный с резервуаром для выдерживания. Полидуктор предназначен для смешивания жидкости с сухим флоккулянтом, поступающим из подающего механизма, и распределения полученного раствора флоккулянта, образованного в результате указанного смешивания в резервуаре для выдерживания. Резервуар для выдерживания предназначен для приема и выдерживания раствора флоккулянта. Насос для раствора флоккулянта предназначен для отведения раствора флоккулянта из резервуара для выдерживания.

MINERAL MATERIALS WITH TREATED SURFACE AND THEIR FIELD FOR CLEANING WATER

SEPARATION AND EXTRACTION OF SELENIUM FROM SLUDGE BIOREACTOR

КОМПЛЕКСНАЯ КОММУНАЛЬНАЯ ЭНЕРГОСИСТЕМА

Комплексная коммунальная энергосистема (10), содержащая i) устройство (12) для выработки электроэнергии и ii) систему (20) очистки сточных вод, причем в системе (20) очистки сточных вод используются вторичные энергоресурсы из устройства (12) для выработки электроэнергии.

УСТРОЙСТВО ОБЕЗВОЖИВАНИЯ

Способы и устройства обезвоживания бурового раствора, содержащие подающий механизм, резервуар для выдерживания, полидуктор, расположенный между подающим механизмом и резервуаром для выдерживания, и насос для раствора флоккулянта, соединенный трубопроводом с резервуаром для выдерживания. Кроме того, устройство включает передвижную платформу для установки подающего механизма, резервуара для выдерживания, полидуктора и насоса для раствора флоккулянта. В вариантах осуществления изобретения полидуктор предназначен для смешивания жидкости с сухим флоккулянтом, поступающим из подающего механизма, и распределения образующегося раствора флоккулянта в резервуаре для выдерживания, резервуар для выдерживания предназначен для приема раствора флоккулянта, насос для раствора флоккулянта предназначен для отведения раствора флоккулянта из резервуара для выдерживания.

СПОСОБ ВОССТАНОВЛЕНИЯ РАСТИТЕЛЬНОГО ПОКРОВА НА УЧАСТКЕ ЗАХОРОНЕНИЯ ОТХОДОВ

Способ восстановления растительного покрова на участке захоронения отходов, который включает использование частиц минерального материала, по которому суспензию частиц минерального материала переносят как флюид на участок осаждения с возможностью растекания по поверхности затвердевшего материала, и обеспечивают отстаивание и твердение, с образованием кучи затвердевшего материала, причем восстановление участка захоронения отходов достигают добавлением к суспензии частиц минерального материала анионного полимера, полученного из одного или нескольких этиленоненасыщенных мономеров, который имеет внутреннюю вязкость менее 4 дл/г, в количестве от 10 до 3000 грамм на тонну частиц минерального материала при его переносе как флюида на участок осаждения, и добавлением семян и питательных веществ в конечный слой материала.

ПРИМЕНИЕ ВОДОРАСТВОРИМОГО АНИОННОГО СИНТЕТИЧЕСКОГО ПОЛИМЕРА ПРИ ОБЕЗВОЖИВАНИИ СУСПЕНЗИИ ЧАСТИЧНОГО МИНЕРАЛЬНОГО МАТЕРИАЛА ДЛЯ ПРИГЛУШЕНИЯ ПЫЛЕОБРАЗОВАНИЯ И СПОСОБ ПРИГЛУШЕНИЯ ПЫЛЕОБРАЗОВАНИЯ В ЧАСТИЧНОМ МИНЕРАЛЬНОМ МАТЕРИАЛЕ

Способ приглушения пылеобразовании в частичном минеральном материале, где частичный минеральный материал был получен путем обезвоживания из суспензии вышеуказанного материала, который включает стадии перенесения суспензии частичного минерального материала как флюида в область осаждения, и в котором суспензии дают возможность отстаиваться и обезвоживаться в области осаждения с образованием обезвоженного частичного минерального материала, где приглушение пылеобразования материала достигается путем добавления пылеприглушаемого количества полимера в суспензию частичного минерального материала при его перенесении как флюида в область осаждения, где полимер является или синтетическим водорастворимым полимером, полученным из одного или нескольких ненасыщенных в этиленобразный способ мономеров, имеющих внутреннюю вязкость, по меньшей мере, 4дл/г, или водорастворимым полимером, который является природным полимером или полуприродным полимером.

ОБРАБОТКА СУСПЕНЗИЙ МИНЕРАЛОВ ДЛЯ ПОВЫШЕНИЯ ПРИГОДНОСТИ ФОРМИРУЕМОГО ИЗ НИХ ОТВАЛА К РЕКУЛЬТИВАЦИИ С ВЫРАЩИВАНИЕМ РАСТЕНИЙ

В заявке описан способ рекультивации отвала, содержащего измельченный минеральный материал, оставшийся от суспензии этого материала в результате ее обезвоживания, для обеспечения пригодности отвала к выращиванию на нем растений, при осуществлении которого суспензию измельченного минерального материала транспортируют в виде текучей среды в отвал и дают суспензии выстояться и обезводиться в отвале с образованием обезвоженного измельченного минерального материала, причем рекультивации отвала достигают добавлением в суспензию при ее транспортировке в виде текучей среды в отвал приводящего к ее обезвоживанию количества полимера, представляющего собой либо синтетический водорастворимый полимер, полученный из одного или нескольких этиленненасыщенных мономеров, имеющих характеристическую вязкость по меньшей мере 4 дл/г, либо водорастворимый натуральный или полунатуральный полимер.

ПОДАВЛЕНИЕ ПЫЛИ

В заявке описан способ подавления образования пыли измельченного минерального вещества, в котором измельченное минеральное вещество образуется путем обезвоживания суспензии указанного вещества, включающий стадии транспортировки суспензии измельченного минерального вещества в виде жидкости на участок для удаления, и в котором суспензию выдерживают на участке для удаления с образованием обезвоженного измельченного минерального вещества, в котором подавление образования пыли вещества обеспечивается путем прибавления обеспечивающего подавление пыли полимера к суспензии измельченного минерального вещества, когда ее транспортируют в виде жидкости на участок для осаждения, в котором полимером является или синтетический растворимый в воде полимер, образованный из одного или большего количества этиленненасыщенных мономеров, обладающий характеристической вязкостью, равной не менее 4 дл/г, или растворимый в воде полимер, который является натуральным полимером или полусинтетическим полимером.

СИСТЕМА РАЗДЕЛЕНИЯ И ОБРАБОТКИ НЕФТЕСОДЕРЖАЩЕГО ГРЯЗЕВОГО ОТСТОЯ

Устройство для обработки нефтесодержащего грязевого отстоя включает в себя котел, теплообменник, содержащий циркуляционный паровой тракт, сообщенный с котлом, и тракт грязевого отстоя, принимающий грязевой отстой, множество последовательно расположенных смесителей, сообщенных с трактом грязевого отстоя теплообменника, разделительный резервуар, сообщенный с множеством смесителей и включающий в себя резервуар, имеющий множество стенок, гидроциклон, установленный внутри резервуара, принимающий грязевой отстой из множества смесителей и включающий в себя выпускное отверстие твердой фазы, направляющее компонент твердой фазы по направлению к нижней части резервуара, и выпускное отверстие жидкой фазы, направляющее компонент жидкой фазы в резервуар, средство для перемещения отделенной твердой фазы вдоль нижней части резервуара к выпускному отверстию твердой фазы и множество выпускных отверстий жидкой фазы, расположенных вертикально вдоль стенки резервуара, причем каждый включает каждое, клапан, ...

СПОСОБ ОБРАБОТКИ СУСПЕНЗИИ ШЛАМА

Способ обработки суспензии шлама, включающей тяжелые металлы и органические вещества, согласно которому осуществляют отделение фракции наибольшего размера, одновременное пассивирование и вспенивание шлама, и сушку полученной пены.

Комбинированная установка для переработки и последующей утилизации осадков, образующихся от очистки сточных вод на цбп производствах

Комбинированная установка применяется для переработки и последующей утилизации осадков, образующихся от биологической и механической очистки сточных вод на целлюлозно-бумажном производстве.Установка для переработки и утилизации осадков сточных вод представляет собой последовательно расположенные блоки сушки, магнитной и реагентной обработки, разделенные между собой функциональными перегородками. Каждый из блоков имеет свое технологическое назначение: в блоке сушки осуществляется процесс выведения воды из состава отхода, затем в блоке магнитной обработки происходит выделение из составной консистенции тяжелых металлов, после чего вещество поступает в блок реагентной обработки, где происходит разделение шлама на известковую и органическую составляющую.Технологической особенностью установки для переработки и утилизации осадков сточных вод является то, что она снабжена функциональными решетчатыми перегородками, отверстия которых регулируются по диаметру в соответствии с необходимостью технологических процессов сушки, просеивания, магнитной и реагентной обработки. Известь может быть в дальнейшем применена для известкования закисленных почв или в строительстве, органика может быть использована как удобрение в сельскохозяйственных целях. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 168 298 U1 (51) МПК C02F 11/00 (2006.01) C02F 11/12 (2006.01) C02F 11/14 (2006.01) C05F 7/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21)(22) Заявка: 2016109330, 15.03.2016 (24) Дата начала отсчета срока действия патента: 15.03.2016 (72) Автор(ы): Трейман Марина Геннадьевна (RU) (73) Патентообладатель(и): Трейман Марина Геннадьевна (RU) R U Дата регистрации: 27.01.2017 Приоритет(ы): (22) Дата подачи заявки: 15.03.2016 Адрес для переписки: 195276, Санкт-Петербург, Суздальский пр-кт, 63, корп. 3, кв. 110, Трейман Марине Геннадьевне 1 6 8 2 9 8 R U (57) Формула полезной модели 1. Комбинированная установка для переработки и ...

Stabilization of biosolids using iron nanoparticles

This invention discloses a stabilized biosolids composition and a method for the stabilization of biosolids. It entails the use of a chemically and biologically reactive material, in the form of ultrafine iron particles. The nanometer-sized iron particles are capable of degrading odorous organosulfur compounds, transforming persistent and toxic organic pollutants such as PCBs and chlorinated pesticides, inhibiting the growth of pathogens by increasing pH and maintaining the increased pH of the stabilized biosolids, immobilizing toxic metal ions such as mercury and lead, and improving the overall quality of biosolids for land application and plant growth.

Process for treatment of wastewater with a modular biological fluidized bed reactor system

A biological wastewater treatment process and modular apparatus wherein activated sludge is recirculated in all of aeration, fluidized bed and return sludge phases in the apparatus.

Sludge separation device and method for its use

A device for dewatering sewage sludge and a method for its use is provided. The device affords separation by causing a sludge concentrate to flow at sufficiently slow rates to cause the gel-like concentrate to fracture and release trapped water. Sewage sludge dewatered according to the method and utilizing the device can be directly burned or directly introduced into a landfill. Certain embodiments of the device can be transported to a site where the dewatering process is carried out and certain embodiments of the device can be further utilized to transport dewatered sludge from the dewatering site to a further disposal site.

Synergistic effect of surfactant combinations as dewatering aids for alumina trihydrate

The invention is directed towards methods and compositions for treating slurry to better dewater alumina trihydrate precipitated from the Bayer process. The method comprises using a product comprising the combination of at least two surfactants together with an optional coupling agent to treat the alkaline slurry with certain amount of alumina trihydrate present. Synergistic effects between binary combinations of nonionic and anionic surfactants result in more efficient dewatering aids for alumina trihydrate slurry when combinations of such surfactants are applied. A coupling agent may be used in formulations to reduce viscosity of such surfactant combinations, allowing the practical application of such products.

Treatment Apparatus and Methods

Various methods and apparatus are disclosed that relate to one or more aspects of a treatment system that circum-neutralizes the pH of an aqueous stream, removes one or more heavy metals from the aqueous stream, circum-neutralizes the pH of a CCR supply, and/or removes one or more heavy metals from the CCR supply.

Process for Drying Oil Sand Mature Fine Tailings

A process for drying fine tailings is provided. The process, which may use a pipeline reactor system, comprises providing an in-line flow of the fine tailings; continuously introducing a flocculent solution to cause dispersion and commence flocculation of the fine tailings and may comprise rapid turbulent mixing; subjecting the fine tailings to flocculation and water release conditioning in-line to cause formation and rearrangement of floes and increasing the yield shear stress to form flocculated fine tailings while avoiding over-shearing of the flocs; and depositing the fine tailings to allow the release of water, formation of a non-flowing fine tailings deposit and drying of the non-flowing fine tailings deposit. The process enables effective in-line dispersion, flocculation and water release, resulting in reliable deposition and drying of the fine tailings deposit.

Process for dewatering of oil sand tailing muds

The present invention relates to a process for dewatering oil sand tailing muds, comprising: (a) adding a flocculant into oil sand tailing muds and mixing the flocculant and the tailing muds; (b) filtering the flocculated tailing muds using a dynamic filtration system, wherein in step (b) a pressure difference is applied over the filter and wherein the dynamic filtration system comprises a means for producing a dynamic action by which the filter cake is continuously or intermittently moved, deformed and/or broken, the filter cake being the solidified material that sets on the filter during filtration. The process is useful for dewatering oil sand tailing muds from tailing ponds, such as those produced in the Athabasca Oil Fields in Canada.

WATER CLARIFICATION METHOD AND DEVICE

The invention relates to a method and device for clarifying water by means treatment of the colloidal structures contained in a liquid and/or a sludge supplied in a continuous flow at a flow rate of Q=V/hour. The flow is sprayed into a chamber () under overpressure conditions in relation to atmospheric pressure, said chamber () having a volume v1.5 Q.4. The method as claimed in claim 1 , characterized in that the air is injected at a pressure of between 1.4 bar and 2.5 bar.522233. The method as claimed in claim 1 , characterized in that the flow is injected into the chamber ( claim 1 , E) of volume v Подробнее

METHOD FOR SEPARATING LIQUID FROM SUSPENDED MATTER IN A SLUDGE AND DEVICE FOR SAME

The invention relates to a method for separating the liquid part from the suspended matter in a sludge supplied in a continuous flow at a flow rate of Q=V/hour. The flow is divided into at least two partial flows which are sprayed on top of one another into a sealed chamber of volume v1.5 Q.3. The method as claimed claim 1 , characterized in that the air is injected at a pressure of between 1.4 bar and 2.5 bar.4. The method as claimed in claim 1 , characterized in that the flow is injected into the chamber of volume v Подробнее

Sludge screw thickener with screen rotation during cleaning

A screw press has a cylindrical screening section mounted to a frame. The screening section is able to rotate but can be prevented from rotating. A sprayer system is operable to spray water on the screening section. In a cleaning process, the screening section is rotated while water is sprayed against it. Optionally, the power required to rotate the screen may be provided by an auger drive mechanism. The screening section may have openings sized to retain flocculated solids. The screw press may be used to thicken a sludge from a waste water treatment plant.

Ash processing and metals recovery systems and methods

Methods and systems for incineration ash such as ash from municipal waste incineration plants, purification and recovery of materials and metals. Increased levels of aggregate and metals recovery and purification are achieved and production of residual ash with less environmental contaminants.

Method for Reclaiming Usable Products from Biosolids

The method of reclaiming usable products from sludge is disclosed. A predetermined level of solvent within an extractor is heated, below boiling point, and dried sludge is immersed within the headed solvent. The solvent is a non-polar or polar aprotic solvents, such as ethyl acetate. The non-solid products, an oil/solvent mixture, within the sludge are separated and transferred to at least one evaporator with a concentration of between 5-25% oil in the solvent. The oil and solvent are is separated in one or more evaporators to remove approximately 80%-90%, and preferably 70%-95%, of the solvent. The solids are moved to a desolventizer for removal of the residual solvent and are then dried to a moisture content of below 25%, and preferably between 10 to 15%. 1. The method of reclaiming usable products from sludge comprising the steps of:a. transferring dewatered sludge from a wastewater treatment plant to a dryer;b. drying said sludge;c. heating a solvent;d. transferring said sludge to an extractor containing the heated solvent;e. In said extractor, separating non-solid products from said sludge using said solvent;f. transferring said separated non-solid products to at least one evaporator;g. removing residual solvent from sludge that is separated from said non-solid products in step (d); andh. recycling solvent from said at least one evaporator and step f, to said extractor.2. The method of wherein oil/solvent mixture from step oil is separated from non-solid product in said at least one evaporator.3. The method of wherein said solvent is ethyl acetate.4. The method of claim 1 , wherein the rate of solvent addition and the time period of contact of solvent and sludge is maintained to produce a concentration of between 5%-25% oil in the solvent.5. The method of claim 1 , wherein the rate of solvent addition and the time period of contact of solvent and sludge are sufficient to produce a solvent content of the solids upon exiting the extractor that is between 10-30% ...

METHOD FOR DEWATERING SLUDGE

The present invention relates to a method for dewatering of sludge, wherein an aqueous solution of polymeric flocculating agent is added to the sludge, wherein the sludge comprises a component to be removed by the flocculating agent being added to the sludge, wherein in order to limit the residual amount of the flocculating agent in a filtrate of the sludge the method comprises a first and/or a second step, wherein the first step comprises—measuring a first content information related to the total amount of solid material in the sludge (organic and inorganic)—measuring a second content information related to a sand material content in the sludge, wherein the first and second content information is used for controlling the addition of the aqueous solution of the polymeric flocculating agent to the sludge, wherein the second step comprises measuring a material information related to a material property of the filtrate, wherein the material information is used for controlling the content of the polymeric flocculating agent in the filtrate. 1. A method for dewatering sludge , comprising:adding an aqueous solution of polymeric flocculating agent to the sludge, wherein the sludge comprises a component to be removed by the flocculating agent;limiting a residual amount of the flocculating agent in a filtrate of the sludge by (i) measuring a first content information related to a solids level in the sludge and (ii) measuring a second content information related to a sand material content in the sludge;controlling the addition of the aqueous solution of the polymeric flocculating agent to the sludge based on the first and second content information;measuring a material information related to a material property of the filtrate;controlling the content of the polymeric flocculating agent in the filtrate based on the material information, wherein the material information comprises the pH-value of the filtrate; andincreasing the pH-value of the filtrate.2. The method of claim 1 , ...

System and Method for lime Stabilization of Liquid Sludge

A lime stabilization system and method is provided in which thickened liquid sludge and lime are separately delivered, under controlled conditions, to a reaction tank and mixed therein to a predetermined pH, controlled via a programmable logic computer. The weight of liquid sludge in the reaction tank is controlled from the computer via load cells that measure the weight of such liquid sludge in the reaction tank. The computer monitors the amount of liquid sludge and lime delivered to the reaction tank, for mixing therein to a desired pH, for a predetermined amount of time, and the resultant mix is discharged from the reaction tank, to a holding tank, for return to the land. 1. A lime stabilization system for treating liquid sludge comprising:(a) a reaction tank having a sludge inlet for receiving liquid sludge delivered to the reaction tank and a lime inlet for receiving lime delivered to the reaction tank;(b) means for thickening liquid sludge to a selected solids concentration;(c) liquid sludge delivery means for delivering thickened liquid sludge to the reaction tank via the sludge inlet, including valve means for controlling the amount of liquid sludge delivered to the reaction tank;(d) load cell means for measuring the amount of liquid sludge in the reaction tank and for conveying that information to a computer means;(e) a lime container for containing lime for delivery to the reaction tank;(f) lime delivery means for delivering lime from the lime container to the reaction tank and for measuring the amount of lime delivered to the reaction tank via the lime inlet and for conveying that information to a computer means;(g) computer means connected to the load cell means of clause (d) and the lime delivery means of clause (f) for monitoring the amount of liquid sludge and lime being delivered to the reaction tank;(h) mixing means in the reaction tank connected to the computer means, for mixing lime and liquid sludge to a predetermined pH controlled by the ...

MIXING APPARATUS FOR CRUSHING SLUDGE

The present invention relates to mixing apparatus for crushing sludge comprising a motor part in which a rotary shaft is inserted into the motor part and the motor part is rotated, a moving part formed to penetrate the motor part from one side to another side and move a chemical which is flowed through an outside chemical feeder to the another side, and a paddle mounted on the another side of the motor part to rotate based on the rotation of the motor part and spray the chemical. 1. A mixing apparatus for crushing sludge comprising:a motor part having a rotary shaft inserted into the motor part and penetrating the motor part from a first side to a second side,a moving part formed to penetrate the motor part from a first side to a second side and move a chemical which is fed by an outside chemical feeder to the second side;a paddle mounted at the shaft on the second side of the motor part to be rotated based on the rotation of the shaft and/or of the motor part and to spray the chemical,wherein the motor part comprises:a main body in which the rotary shaft is inserted;a first plate combined with the first side of the main body and one outer circumference of the shaft; anda second plate combined with the second side of the main body and another outer circumference of the shaft,wherein the second plate comprises:a second bearing part combined with an outer circumference of the shaft;a second sealing part combined to surround the second bearing part around an outer circumference of the second bearing part; anda securing part surrounding the second bearing part and the second sealing part, and securing the second bearing part and the second sealing part at or to the second side of the motor part.2. The mixing apparatus for crushing sludge according to claim 1 , wherein the paddle has a moving hole through which the chemical moves inside the paddle claim 1 , a discharge hole connected to the moving hole and discharging the chemical to the outside claim 1 , and/or a saw- ...

Method and apparatus for treating waste materials

A method and apparatus for treating waste materials comprising, particulating the waste materials into discrete particles, heating and drying the particles in a non-oxidizing atmosphere in a drier at a temperature in the range of 800° to 860° C. for carbonizing the particles, crushing the carbonized particles and leaching the crushed carbonized particles in an acid solution for dissolution of heavy metals into the solution, separating the leach solution containing heavy metal from the carbonized particles, adding to the carbonized particles particulate sodium hydroxide, silica, feldspar and limestone in a ratio of 100:0.3-0.5:8-12:2-4, mixing said particles with 15 to 18% by weight water to form a wet mixture and continuously extruding the wet mixture to form an elongated continuous extrusion, severing the elongated extrusion into blocks or planks of predetermined length, drying the blocks or planks and heating the dried blocks or planks in a kiln at a temperature in the range of 1200° to 1300° C. for a time sufficient in an oxygen deficient atmosphere to sinter the blocks or planks and to form carbides, and separating and recovering CO 2 gas from combustion gases in the kiln.

UTILIZATION OF IRON SALTS TO STABILIZE AND/OR DISINFECT BIOSOLIDS

In order to render sewage sludge suitable for beneficial purposes, it must be disinfected and stabilized. EDC deactivation is rapidly becoming a desirable result of any sludge or biosolids treatment process. Disclosed herein is a process of treating sewage sludge so as to stabilize the sludge that involves the presence of an iron-containing compound during dewatering of the sludge. Process embodiments described also achieve biosolid samples that have reduced EDC activity, Other embodiments disclosed involve use of a combination of iron salts ferrate and ferric chloride that are added to wastewater sludge in the dewatering step before heat drying. The biosolids resulting from sludge treated with aniron-containing compound are able to resist putrefaction for more than two to three weeks. 1. A method for the treatment of sewage sludge containing solids , comprising:(a) dewatering the sewage sludge in the presence of an iron-containing compound to a produce biosolid cake, wherein said iron-containing compound is provided at about 1% to about 10% of the solid content of the sewage sludge;(b) and(c) heat-drying the biosolid cake to produce a stabilized biosolid sample.2. The method of claim 1 , wherein the amount of iron containing compound is about 1% to about 5% of the solid content of the sewage sludge.3. The method of claim 2 , wherein the amount of iron-containing compound is about 1.8% to about 2.3% of the total solids content of the sewage sludge.4. The method of claim 1 , wherein the iron-containing compound is an iron salt or ferrate.5. The method of claim 4 , wherein the iron salt is ferric chloride or ferric sulfate.6. The method of claim 1 , wherein the sewage sludge is at a pH such that the iron salt produces ferric hydroxide.7. The method of claim 1 , wherein the stabilized biosolid sample comprises reduced EDC activity.8. The method of claim 8 , wherein the biosolid cake is thickened to about 75% to about 85% moisture content.9. The method of claim 1 , ...

SOLID-LIQUID SEPARATION DEVICE

A solid-liquid separation device performs dehydration or deoiling from a treated object using a substance A that is a gas at normal temperature and pressure and is capable of dissolving water and oil when liquefied. The separation device includes a substance B that circulates while generating phase change in a closed system, a compressor that compresses the substance B, a first heat exchanger that condenses substance B and evaporates of the substance A, an expansion valve that decompresses the condensed substance B, a second heat exchanger that evaporates substance B and condenses substance A, and a treatment tank wherein substance A is mixed with the treated object, substance A is evaporated while separated from the liquid in the first heat exchanger, and condensed in the second heat exchanger. The center of gravity of the first heat exchanger is lower than the second heat exchanger in a vertical direction. 1. A solid-liquid separation device that performs dehydration or deoiling from an object to be treated that is a mixture of water and a solid , a mixture of oil and a solid , or a mixture of water , oil , and a solid , as the object to be treated , using a substance A capable of dissolving water and oil , the solid-liquid separation device comprising:a substance B that is circulated while generating phase change in a closed system;a compressor that compresses the substance B;a first heat exchanger that exchanges heat of condensation of the substance B and heat of evaporation of the substance A;expansion means that decompresses the condensed substance B;a second heat exchanger that exchanges heat of evaporation of the substance B and heat of condensation of the substance A; anda treatment tank in which the substance A is mixed with the object to be treated, the substance A having been evaporated while separated from the water or the oil in the first heat exchanger, and condensed in the second heat exchanger, whereina center of gravity of the first heat exchanger ...

ENHANCED FLOCCULATION OF INTRACTABLE SLURRIES USING SILICATE IONS

Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation. 1. A process for treating a slurry comprising an intimately dispersed mixture of water , bitumen , and fine clay particles , having a slurry solids content of 20-50% , a pH of 7 to 8.5 , an aluminate concentration of less than 85 mg/L and a sulfate concentration of less than 110 mg/L the process comprising:{'sub': 3', '4, 'sup': '−', 'adding a source of silicate HSiO ions to the slurry to provide a silicate-treated slurry having a silicate ion dosage of about 350-20,000 ppm (or 350-20,000 g silicate ion per metric ton of dry tailings);'}optionally adding a biopolymer co-agent in the form of polysaccharides in the dosage of 500-2000 ppm (or 500-2000 g of agent per metric ton of dry tailings);adding an alkali to the silicate-treated slurry to raise the pH to provide a basic silicate-treated slurry having a pH of from about 9 to about 12, or about 10; and,allowing the basic silicate-treated slurry to separate into a plurality of layers having distinct densities, wherein a bottom layer comprises packed clay particles.2. The process of claim 1 , wherein adding the alkali to the silicate-treated slurry to raise ...

Solid-Liquid Separation System

To provide a solid-liquid separation system in which a stable operation can be continuously conducted and the introduction cost and the running cost can be suppressed, in cases where moisture or oil are separated from a substance containing moisture or oil by using changes in phase of a working fluid having a nature of dissolving moisture or oil in a liquid phase. Provided is a solid-liquid separation system in which a working fluid that dissolves moisture or oil in a liquid phase is liquefied and brought into contact with a solid substance to thereby allow the working fluid to contain moisture or oil that has been contained in the solid substance, and then the working fluid is vaporized to precipitate the moisture or oil, characterized in that the solid-liquid separation system is provided with a fluid circuit in which a high-temperature-side heat exchanger that vaporizes the working fluid by a refrigerant, a low-temperature-side heat exchanger that liquefies the working fluid by the refrigerant are connected to circulate the working fluid, and a refrigerating cycle in which a compressor, a condenser that exchanges heat with a heat source other than the working fluid, the high-temperature-side heat exchanger, an expansion mechanism, and the low-temperature-side heat exchanger are sequentially connected to circulate the refrigerant, and that the solid-liquid separation system includes a recovery operation mode in which the working fluid in a filling tank is vaporized, besides the solid-liquid separation. For performing the recovery operation mode, a second expansion mechanism is provided between the condenser and the high-temperature-side heat exchanger. The system is also characterized in that the fluid circuit is provided with a heating unit that does not use the refrigerant as a heat source.

METHODS FOR REDUCING GREENHOUSE EMISSIONS FROM ANIMAL MANURE

Greenhouse gases are lowered in treatment of animal manure from a CAFO by eliminating or reducing anaerobic digestion. The manure product is admixed with drying agents and is suitable for use as fertilizer or fuel while severely curtailing odor at the same time. 1. A method of decreasing emission of CO-equivalent greenhouse gases in a CAFO operation , comprising:substantially reducing anaerobic digestion of organic waste solids contained in a liquid from a CAFO and preserving organic nitrogen in the liquid in an anaerobic lagoon by increasing the pH of the liquid to above 9.0 or decreasing the pH of the liquid to below 5.5;concentrating undigested organic waste solids by dewatering; andneutralizing the concentrated undigested organic waste solids in a mixer, optionally with an addition of a drying agent, wherein the heat of the neutralization reaction and energy input of the mixer result in the formation of a dry admixture.2. The method of claim 1 , wherein the organic waste solids are contained in a sluice liquid containing manure and water claim 1 , and the step of increasing the pH or lowering the pH of the anaerobic lagoon occurs prior to entry of the sluice liquid into the anaerobic lagoon.3. The method of claim 1 , wherein the pH is adjusted by addition of HCl claim 1 , HSO claim 1 , waste pickle liquor claim 1 , gypsum claim 1 , limestone claim 1 , lime claim 1 , lime kiln dust claim 1 , cement kiln dust claim 1 , coal or wood combustion ash claim 1 , potash claim 1 , or soda ash.4. The method of claim 1 , further comprising capturing ammonia liberated during the addition of a drying agent to the organic waste solids.5. A method of preventing anaerobic decomposition of organic nitrogen of manure in an anaerobic lagoon claim 1 , the method comprising:adding an alkaline or acid component to a concentrated manure slurry prior to the slurry's entrance to the lagoon such that anaerobic biological decomposition of the organic nitrogen of the manure while in the ...

Reverse flow type multi-stage sedimentation rake-free thickening device

Disclosed is a reverse flow multi-stage sedimentation rake-free thickening device relating to the field of slime water treatment. The device includes a feed assembly, a guide assembly, and a clean coal collection assembly. The guide assembly also includes a central tank body and coal slurry flows from the upper part of the central tank body to the inner side wall of the central tank body through the feed assembly and the medicament, and then flows to the middle of the central tank body through the guide assembly. After the reaction, the bubbles carry the fine coal slime and move up to the clean coal collection assembly. The clean coal collection assembly is located above the outlet of the guide assembly, and the clean coal collection assembly is sequentially provided with a central collection area, a defoaming area, and a diversion settlement area from the middle to the outside.

IN-LINE DYNAMIC MIXING APPARATUS FOR FLOCCULATING AND DEWATERING OIL SANDS FINE TAILINGS

The present invention relates to an in-line mixing apparatus and use therein for adding a polymer solution and dewatering an aqueous mineral suspension. Said method comprises statically mixing the aqueous mineral suspension with a poly(ethylene oxide) (co)polymer to form a dough-like material. The viscous mixture material is then dynamically mixed in an in-line reactor to reduce the mixture viscosity and to form microflocs and release water. Said method is particularly useful for the treatment of suspensions of particulate material, especially waste mineral slurries, especially for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings. 110-. (canceled)11. A method of dewatering an aqueous suspension of oil sands fine tailings , the method comprising: an in-line pipeline reactor that has a reactor inlet pipe for an in-line flow of the dough-like mixture of the polymeric flocculate and the aqueous suspension of oil sands fine tailings and a reactor outlet pipe for a dynamically mixed mixture that includes microflocs and released water, and', 'the in-line pipeline reactor includes one or more rotor connected to a mixer shaft that is rotated by a drive, and one or more stationary stator that has a stator hub through which the mixer shaft passes, but is not attached to the mixer shaft, and that is arranged in an alternating fashion with the one or more rotor, each rotor of the one or more rotor being separated from each stator of the one or more stationary stator; and, 'dynamically mixing a dough-like mixture of a polymeric flocculant and an aqueous suspension of oil sands fine tailings in an in-line apparatus that includes{'sup': '−1', 'the one or more rotor and one or more stationary stator providing shear to the dough-like mixture that enters the reactor inlet pipe to form the dynamically mixed mixture that includes microflocs and released water that exits the reactor outlet pipe, and ...

WATER SEPARATION FROM PARTICULATE MATERIALS

A composition for solid pellets and a process for removing water from particulate material slurries produced by horizontal drilling, vertical drilling and dredging of bodies of water are disclosed. The composition comprises a precipitating agent, a purification agent and, optionally, a binding agent. The process comprises the steps of 1) water removal accomplished by diffusing a chemical reagent into the particulate material source stream that results in separating out a clean water fraction and 2) reacting the sludge with a demulsifier and a superabsorbent polymer that locks onto the water in the remaining slurry thus turning the slurry into a solid crust. The crust is ground into a particulate form and disposed in a landfill. The combined effect of the treatments is the thickening of the particulate material slurry from about 10% solids to about 25% solids. The removed water may be used for further drilling and drinking. 1. A process for removing water from a mixture of water and particulate material , said process comprising:providing a source stream containing a mixture of water and particulate material having a weight consistency of 5% to about 15%;a first step of treating said source stream with a first chemical reagent composition, said first step comprising diffusing said first chemical reagent composition into the source stream, said treating resulting in separating said source stream treated with the first chemical reagent composition into a first particulate material fraction and a first water fraction, the first particulate material fraction containing 70% to about 80% water;a second step of transforming the first particulate material fraction from a liquid form into a solid block form; anda third step of transforming the solid block into granular form, wherein the second step and third step of transforming the first particulate material fraction from a liquid form into a solid block form and then into granular form comprise:A. Feeding the first ...

UNIT FOR TREATING A DRILLING MUD AND CORRESPONDING METHOD

A drilling mud treatment unit () comprises a primary duct () for feeding coagulated drilling mud, an in-line flocculation system () for flocculating the coagulated drilling mud flowing in the primary duct (), and at least one hydrocyclone () fed by the primary duct () and arranged downstream from the flocculation system (). The hydrocyclone () has an overflow orifice () for receiving a liquid product resulting from treatment of the drilling mud and an underflow orifice () for receiving a solid product resulting from treatment of the drilling mud. The overflow orifice () presents an overflow diameter (Do) and the underflow orifice presents an underflow diameter (Du), and the underflow diameter (Du) is greater than 1.1 times the overflow diameter (Do). 1. A treatment method for treating drilling mud , the method comprising at least the following succession of steps:feeding a primary feed duct with coagulated drilling mud;flocculating the coagulated drilling mud in-line while it is flowing in the primary feed duct;introducing the coagulated and flocculated drilling mud into a hydrocyclone having an overflow orifice presenting an overflow diameter, and an underflow orifice presenting an underflow diameter, the underflow diameter being greater than the overflow diameter, with a ratio greater than 1.1 between the underflow diameter and the overflow diameter; anddischarging a solid product resulting from treatment of the drilling mud via the underflow orifice, and a liquid product resulting from treatment of the drilling mud via an overflow orifice.2. The treatment method according to claim 1 , wherein the step of flocculating the coagulated drilling mud includes feeding a flocculating agent through a secondary duct connected to the primary duct at a junction situated downstream from a pump of the primary feed duct.3. The treatment method according to claim 2 , wherein the step of flocculating the coagulated drilling mud further includes mixing the coagulating drilling mud ...

SOLID-LIQUID SEPARATION DEVICE

A solid-liquid separation device performs dehydration/deoiling from a mixture of water and/or oil and a solid. Substance A is capable of dissolving water and oil. The device includes substance B circulated while generating phase change in a closed system; a compressor; a first heat exchanger exchanging condensation heat of substance B and evaporation heat of substance A; a second heat exchanger exchanging evaporation heat of substance B and condensation heat of substance A; and a treatment tank for mixing substance A with an object to be treated; substance A having been evaporated while separated from the water or the oil in the first heat exchanger, and condensed in the second heat exchanger. The first heat exchanger is lower than the treatment tank in a vertical direction, and a connection port of the first heat exchanger and a lower portion of the treatment tank are connected with a flow path. 1. A solid-liquid separation device that performs dehydration or deoiling from an object to be treated that is a mixture of water and a solid , a mixture of oil and a solid , or a mixture of water , oil , and a solid , as the object to be treated , using a substance A capable of dissolving water and oil , the solid-liquid separation device comprising:a substance B that is circulated while generating phase change in a closed system;compression means that compresses the substance B;a first heat exchanger that exchanges heat of condensation of the substance B and heat of evaporation of the substance A;a second heat exchanger that exchanges heat of evaporation of the substance B and heat of condensation of the substance A; anda treatment tank in which the substance A is mixed with the object to be treated, the substance A having been evaporated while separated from the water or the oil in the first heat exchanger, and condensed in the second heat exchanger, whereinthe first heat exchanger is installed in a lower portion than the treatment tank in a vertical direction, anda ...

Method and device for treating liquid sludge and filter cakes obtained by said method

Treating and conditioning liquid sludge and a solidified sludge cake obtained thereby are disclosed. A first emulsion of sludge is formed in an in-line container fed at a first flow rate Q owing to the impact of the sludge with air injected into the container at a rate Q′, where Q′>5Q, in a first region which has a small volume of less than 0.05 m3. The first emulsion is then transferred into a second region of the container extending over a first length, and is then discharged via a component which generates a head loss in a chamber extending over a second length. A flocculant is injected in order to obtain a second coagulated emulsion, which is at least partially degasified. The matter in suspension in the second emulsion obtained in this way is then filtered or decanted.

Apparatus And Process For Flocculation Of Solids Fractions Of A Solid-Liquid Mixture

The present invention relates in particular to an apparatus for flocculation of solids fractions of a solid-liquid mixture, in particular sludge or gray water, having a mixing sector ( M) configured for conducting the solid-liquid mixture having a first mixing unit () having a static mixer () adapted for admixing a first flocculation agent and having a second mixing unit () fluidly connected in series with the first mixing unit () having a dynamic mixer () adapted for admixing a second flocculation agent into the mixing sector ( M). 126514177516186. An apparatus () for flocculating solids fractions of a solid-liquid mixture , more particularly sludge or graywater , comprising a mixing sector ( , M) designed for conducting the solid-liquid mixture and comprising a first mixing unit () , having a static mixer ( , , P) adapted for admixing a first flocculating agent (F) , and a second mixing unit () , connected in series fluidically with the first mixing unit () and optionally sited fluidically downstream , having a dynamic mixer ( , ) adapted for admixing a second flocculating agent (F2) to the mixing sector ( , M).2214176161832336. The apparatus () as claimed in claim 1 , wherein the static mixer () comprises one or more impact means () claim 1 , designed in the volume of the mixing sector ( claim 1 , M) claim 1 , and/or the dynamic mixer () comprises one or more mixing rotors ( claim 1 , claim 1 , ) protruding into the volume of the mixing sector ( claim 1 , M) and coupled to a motor drive unit.32171717617617. The apparatus () as claimed in claim 2 , wherein the one or more impact means () is at least one of the at least one impact plate () claim 2 , wherein the at least one impact plate has an impact surface (P) which is disposed transversely claim 2 , to the flow traversal direction (D) resulting for the solid-liquid mixture in regular operation claim 2 , and/or wherein at least one of the at least one impact plate () claim 2 , is disposed centrally in relation to ...

WASTEWATER TREATMENT SYSTEM AND METHOD FOR PRODUCING SLUDGE FOR CEMENT MANUFACTURING

A wastewater treatment system, including a wastewater phase-separation device, may be used to combine at least one primary treatment chemical and wastewater to produce cleaned water and a sludge byproduct. The wastewater treatment system may also include a wastewater dewatering device that may be used to combine the sludge byproduct and at least one secondary treatment chemical to produce a Medium to High Solids Content Sludge without excess water. A method for producing sludge for cement manufacturing may include combining wastewater and at least one primary treatment chemical to form a liquid phase and a solid phase, where the liquid phase includes clean water and the solid phase includes a sludge byproduct, separating the liquid phase from the solid phase, combining the solid phase with at least one secondary treatment chemical to form an intermediate that contains excess water, and removing the excess water from the intermediate to form a Medium to High Solids Content Sludge. 1. A wastewater treatment system , comprising:a wastewater phase-separation device that combines at least one primary treatment chemical and wastewater to produce cleaned water and a sludge byproduct; anda wastewater dewatering device that combines the sludge byproduct and at least one secondary treatment chemical to produce a Medium to High Solids Content Sludge and remove excess water.2. The wastewater treatment system of claim 1 , further comprising a cement kiln that heats the Medium to High Solids Content Sludge to form clinker.3. The wastewater treatment system of claim 1 , wherein the at least one primary treatment chemical comprises one or more of: bentonite clay claim 1 , polymer claim 1 , silica claim 1 , calcium hydroxide claim 1 , aluminum coagulant claim 1 , ferric sulfate claim 1 , and iron coagulant.4. The wastewater treatment system of claim 1 , wherein the last least one secondary treatment chemical comprises one or more of: bentonite clay claim 1 , calcium hydroxide claim ...

TREATMENT OF AQUEOUS MINERAL SUSPENSIONS WITH POLYMERIC FLOCCULANTS

The present invention relates to a method of dewatering an aqueous mineral suspension comprising introducing into the suspension a flocculating system comprising a poly(ethylene oxide) copolymer, in particular a copolymer of ethylene oxide and one or more epoxy or glycidyl ether functionalized hydrophobic monomer. Said poly(ethylene oxide) copolymers are useful for the treatment of suspensions of particulate material, especially waste mineral slurries. The invention is particularly suitable for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings. 2. The poly(ethylene oxide) copolymer of wherein the modified alkaline earth hexammine catalyst is a modified calcium hexammine catalyst.3. The poly(ethylene oxide) copolymer of wherein the epoxy or glycidyl ether functionalized hydrophobic monomer is 1 claim 1 ,2-epoxy tetradecane; 2-ethylhexylglycidyl ether; 2 claim 1 , 2 claim 1 , 3 claim 1 , 3 claim 1 , 4 claim 1 , 4 claim 1 , 5 claim 1 , 5-octafluoropentyl ether; benzyl glycidyl ether; and 4-nonylphenyl glycidyl ether.4. The poly(ethylene oxide) copolymer of further comprsing one or more additional monomer.6. The method of wherein the modified alkaline earth hexammine catalyst is a modified calcium hexammine catalyst.7. The method of wherein the aqueous suspension of particulate material comprises tailings and other waste material resulting from the mineral processing of phosphate claim 5 , diamond claim 5 , gold claim 5 , mineral sands claim 5 , zinc claim 5 , lead claim 5 , copper claim 5 , silver claim 5 , uranium claim 5 , nickel claim 5 , iron ore claim 5 , coal claim 5 , oil sands claim 5 , or red mud.8. The method of wherein the aqueous suspension of particulate material comprises tailings and other waste material resulting from the mineral processing of oil sands. The present invention relates to polymeric flocculants, specifically poly(ethylene oxide) copolymers comprising ...

POLYMERIC FLOCCULANTS FOR TREATING AQUEOUS MINERAL SUSPENSIONS

The present invention relates to a method of dewatering an aqueous mineral suspension comprising introducing into the suspension a flocculating system comprising a poly(ethylene oxide) copolymer, in particular a copolymer of ethylene oxide and one or more silane- or siloxane-functionalized glycidyl ether monomer. Said poly(ethylene oxide) copolymers are useful for the treatment of suspensions of particulate material, especially waste mineral slurries. The invention is particularly suitable for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings. 2. The poly(ethylene oxide) copolymer of wherein the modified alkaline earth hexammine catalyst is a modified calcium hexammine catalyst.3. The poly(ethylene oxide) copolymer of wherein the silane- or siloxane-functionalized glycidyl ether monomer is 3-glycidyloxypropyl polydimethy siloxane wherein n is 1 to 50; 3-glycidyloxypropyl trimethoxysilane; or 3-glycidoxypropyldimethylethoxysilane.4. The poly(ethylene oxide) copolymer of further comprising one or more additional monomer.6. The method of wherein the modified alkaline earth hexammine catalyst is a modified calcium hexammine catalyst.7. The method of wherein the aqueous suspension of particulate material comprises tailings and other waste material resulting from the mineral processing of phosphate claim 5 , diamond claim 5 , gold claim 5 , mineral sands claim 5 , zinc claim 5 , lead claim 5 , copper claim 5 , silver claim 5 , uranium claim 5 , nickel claim 5 , iron ore claim 5 , coal claim 5 , oil sands claim 5 , or red mud.8. The method of wherein the aqueous suspension of particulate material comprises tailings and other waste material resulting from the mineral processing of oil sands. The present invention relates to polymeric flocculants, specifically poly(ethylene oxide) copolymers comprising ethylene oxide and a silane- or siloxane-functionalized glycidyl ether monomer, and use ...

Column thickener and a process thereof for dewatering of iron ore slurry

The present invention is related to a high aspect ratio column thickener and a process thereof useful for dewatering of iron ore tailings. The column thickener has been developed with multiple feed inlet points and an auxiliary inlet point for water to clear the jam of high concentration slurry, if required. The column also consists of a conical portion at the bottom. Magnetic field has been applied using induced magnetic coil just above the conical portion of column thickener. Iron ore tailings slurry is fed into the column thickener and particles are allowed to settle in axial direction with and without the application of magnetic field.

TREATMENT OF THICK FINE TAILINGS INCLUDING CHEMICAL IMMOBILIZATION, POLYMER FLOCCULATION AND DEWATERING

A process for the treatment of thick fine tailings that include constituents of concern (CoCs) and suspended solids is provided. The process includes subjecting the thick fine tailings to treatments including chemical immobilization of the CoCs, polymer flocculation of the suspended solids, and dewatering. The chemical immobilization can include the addition of compounds enabling the insolubilization of the CoCs. Subjecting the thick fine tailings to chemical immobilization and polymer flocculation can facilitate production of a reclamation-ready material, which can enable disposing of the material as part of a permanent aquatic storage structure (PASS). 1. A process for treating tailings , comprising:adding a flocculant to an in-line flow of material comprising tailings to produce a flocculating material;subjecting the flocculating material to shear conditioning to form a conditioned flocculated material;conveying the conditioned flocculated material to a pit under shear rate and energy conditions that are lower than those of the shear conditioning used to form the conditioned flocculated material; anddischarging the conditioned flocculated material into the pit to enable water separation.2. The process of claim 1 , wherein the shear conditioning is pipeline shear conditioning provided to put the conditioned flocculated material in a water release zone upon discharging into the pit claim 1 , thereby producing a water component and a solids-enriched component comprising flocculated solids.3. The process of claim 2 , wherein the pipeline shear conditioning is performed to:produce a gel-state material having increased yield stress; and thenproduce the conditioned flocculated material having an ungelled state and a decreased yield stress compared to the gel-state material.4. The process of claim 2 , wherein the conditioned flocculated material being in the water release zone results in an initial clay-to-water ratio (CWR) in the solids-enriched component of at least 0. ...

HIGH RATE THICKENER AND EDUCTORS THEREFOR

A thickener for dewatering fluids having a vessel with a central well extending proximate a top portion of the vessel to a lower cone-shaped portion, a hindered settling zone, and a compressible sediment layer zone within the lower cone-shaped portion. Eductors housed in inlet wells have an inlet nozzle and a mixing tube to receive slurry to be treated and clear fluid to be mixed with the slurry. The fluid from the eductors is directed in counter circular paths via circular chambers situated proximate the inlet wells, such that fluid flowing in each direction collides and forms turbulence within the central well. Resultant fluid is directed into a lamella-type separator circumferentially located about a portion of the central well, having layered fluid paths directed radially outwards from said center longitudinal axis and upwards towards said vessel top portion through a conical, inclined fluid path, plate structure. The eductors are adjustable with a movable iris for limiting the amount of clear fluid exiting the eductor. 1. A thickener for dewatering fluids which contain a fraction of solids in the form of a slurry , said thickener comprising:a vessel having a top portion and a center longitudinal axis, a central well extending proximate said top portion to a lower cone-shaped portion of said vessel, said central well centered about said center longitudinal axis;a hindered settling zone and a compressible sediment layer zone within said lower cone-shaped portion;at least two inlet wells for fluid ingress into said central well;an eductor housed in each of said at least two inlet wells, said eductor including an inlet nozzle and a mixing tube, each of said eductors receiving ingress fluid to be treated from said inlet nozzle;said mixing tube fixedly attached to said inlet well, circumferentially housing said inlet nozzle, such that a first fluid traversing through said mixing tube is separated from said ingress fluid to be treated traversing through said inlet ...

Mineral recovery control

A mineral recovery system for use in a mining operation is described. The mineral recovery system includes a mining operations model generated based on inputs of sensed conditions, wherein the mining operations model incorporates a thickener sub-model and a material sub-model. The mineral recovery system includes a thickener controller to issue commands based on the mining operations model. The mineral recovery system includes a thickener having a process water. The thickener also includes an underflow output provided with an underflow controller to adjust outflow of thickened slurry from the thickener based on issued commands. The thickener further includes an overflow output to dispense clarified water from the thickener.

PROCESS FOR PRODUCING AN ANIONIC LIGNIN COPOLYMER UNDER AQUEOUS ACID CONDITIONS

An acidic water-based process was developed for the synthesis of anionic lignin copolymers with adjustable MW, thermal stability and solubility in water. The anionic lignin copolymer described herein comprises: a molecular weight of 5,000 to 7.4×10g/mol; and a charge density of −1 to −7.2 meq/g. The anionic lignin copolymers described herein which have a molecular weight range of 000-50,000 g/mol can be used as dispersants of negatively charged molecules or particles in numerous process or wastewater streams (e.g. concrete admixtures, gypsum slurries, textile dye) while such copolymers in a molecular weight range of 90,000-740,000 g/mole can be used as flocculants of positively charged molecules or particles in numerous process and wastewater streams including industrial and municipal systems and sludge dewatering in the textile dye, pulp & paper, mining and oil industries. 1: A method for preparing an anionic lignin copolymer comprising:providing water;providing a lignin;providing at least one anionic monomer;mixing the water, the lignin, and the at least one monomer compound under acidic free radical generating conditions to polymerize the lignin and at least one monomer compound in aqueous suspension and to produce the anionic lignin copolymer.2: The method of claim 1 , wherein the anionic monomer is a vinyl monomer.3: The method of claim 2 , wherein the vinyl monomer is selected from the group consisting of: acrylic acid claim 2 , acrylonitrile and methyl methacrylate and combinations thereof.4: The method of claim 2 , wherein the anionic monomer is acrylic acid.5: The method of claim 1 , wherein the acidic free radical generating conditions are in aqueous solution with an acid and at least one of a free radical initiator claim 1 , a UV light claim 1 , and microwaves.6: The method of claim 5 , wherein the free radical initiator is sodium persulphate or potassium persulphate.7: The method of claim 1 , wherein the pH of the acidic free radical generation ...

Biofilm carrier media in moving bed biofilm reactor processes

The invention pertains to a bio-carrier to carry a biofilm in a moving bed biofilm reactor (MBBR), the carrier being a particle comprising dehydrated sludge. The use of a bio-carrier in a MBBR process to purify a liquid from contaminants is disclosed and a method of manufacture of a bio-carrier is provided.

Method for treating a waste stream using a bioreactor and a membrane filter

Method for treating a fluid aqueous waste stream comprising a biodegradable organic substance, comprising—feeding said stream into a bioreactor containing a fluid which contains biomass;—reacting the biodegradable organic substance with the biomass in the bioreactor under essentially anaerobic conditions;—taking a first flow from the bioreactor and using the first flow as a feed to a membrane filtration unit, in which said feed is subjected to filtration, thereby forming a permeate stream and a retentate stream;—returning the retentate stream to the bioreactor;—taking a second flow from the bioreactor as feed to a sludge treatment unit, in which sludge treatment unit the second flow is separated into a third flow, having an increased organic substance content compared to the second flow, and a fourth flow, having a decreased organic substance content compared to the second flow.

Multistage separation reaction tank and method for treating sewage sludge by using alkane-based solvent using same

The present invention relates to a multistage separation reaction tank for treating sewage sludge by forming a collection layer, a diffusion layer, a primary buffer layer, a secondary buffer layer, and an inorganic precipitate layer when treating an organic material by adding a liquid solvent having a specific gravity less than water to the sewage sludge. In addition, the present invention relates to a method for treating sewage sludge by using an alkane-based solvent, wherein the method significantly lowers the water content of the sewage sludge by using an alkane-based solvent which is in a liquid state and non-polar at atmospheric pressure and room temperature.

SURFACE-TREATED MINERAL MATERIALS AND ITS USE IN WATER PURIFICATION

The present invention relates to a process for increasing the solids content of aqueous sludges and/or sediments, to the use of a surface-treated mineral material for increasing the solids content of sludges and/or sediments, and to a composite material comprising a surface-treated mineral material and impurities obtainable by said process. 1. A process for increasing the solids content of aqueous sludges and/or sediments , comprising the following steps of:a) providing aqueous sludge and/or sediment to be dewatered comprising impurities;b) providing at least one surface-treated mineral material, wherein the mineral material prior to surface-treatment has a tapped bulk density measured according to the standard method ISO 787/11 of the dry powder from 0.05 g/mL to 0.80 g/mL and wherein the mineral material is surface-treated by a material which provides a cationic charge to the mineral material,c) contacting sludge and/or sediment of step a) with the at least one surface-treated mineral material of step b) for obtaining a composite material of surface-treated mineral material and impurities andd) removing water from the sludge and/or sediment comprising the composite material of step c).2. The process according to claim 1 , wherein the sludge and/or sediment of step a) is selected from sludge such as harbour sludge claim 1 , river sludge claim 1 , coastal sludge or digested sludge claim 1 , mining sludge claim 1 , municipal sludge claim 1 , civil engineering sludge claim 1 , drilling mud claim 1 , sludge from oil drilling claim 1 , waste water or process water from breweries or other beverage industries claim 1 , waste water or process water in the paper industry claim 1 , colour- claim 1 , paints- claim 1 , or coatings industry claim 1 , agricultural waste water claim 1 , slaughterhouse waste water claim 1 , leather industry waste water and leather tanning industry.3. The process according to claim 1 , wherein the at least one surface-treated mineral material of ...

Fracturing fluid comprising a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropane sulphonic acid and hydraulic fracturing method

The present invention relates to a fracturation fluid comprising at least one propping agent and at least one water-soluble (co)polymer prepared from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid and/or at least one of its salts. The invention relates to a process to prepare said fluid, and to a hydraulic fracturation process using said fluid.

ENVIRONMENTALLY SUSTAINABLE CEMENT COMPOSITION, ITS USE FOR INERTING DREDGING SEDIMENTS/SLUDGES, RELATIVE METHOD AND APPARATUS FOR INERTING

A cement composition based on a sulfoaluminate clinker is described, together with its use for agglomerating and inerting sediment/dredging sludge, and the relative inerting method and apparatus. 1. An environmentally sustainable cement composition which comprises a sulfoaluminate clinker in a percentage ranging from 75 to 97.9% by weight with respect to the weight of the cement , ferrous sulfate (FeSOnHO) in a percentage ranging from 2 to 20% by weight with respect to the weight of cement , and an accelerating agent of a hydration reaction in a percentage ranging from 0.1 to 5% by weight with respect to the weight of the cement.2. The cement composition according to claim 1 , wherein the sulfoaluminate clinker has a content of 4CaO.3AlO.SO(“C4A3 $”) higher than 5% by weight with respect to the total weight of the clinker and a content of (CaO)SiO(“C2S”) lower than 75% by weight with respect to the total weight of the clinker.3. The cement composition according to claim 1 , wherein the sulfoaluminate clinker comprises from 40% to 80% by weight of C4A3$ and from 15% to 25% by weight of C2S claim 1 , with respect to the total weight of the clinker claim 1 , where the remainder of the cement composition is comprised of oxides and/or minor phases.4. The cement composition according to claim 1 , wherein FeSOis present in a percentage ranging from 2 to 20% by weight with respect to the weight of cement.5. The cement composition according to claim 1 , wherein the accelerating agent of the hydration reaction comprises an alkaline metal salt of a carbonate claim 1 , sulfate or nitrate claim 1 , and is more preferably lithium carbonate or sodium carbonate and more preferably lithium carbonate.6. The cement composition according to claim 1 , comprising:a sulfoaluminate clinker comprising from 54% to 62% by weight of C4A3$ and from 18% to 22% by weight of C2S with respect to the total weight of the clinker, said sulfoaluminate clinker being present in a quantity ranging from 90 ...

MINERAL RECOVERY CONTROL

A mineral recovery system for use in a mining operation is described. The mineral recovery system a thickener includes a process water input, an underflow output having an underflow controller configured to adjust outflow of thickened slurry from the thickener, an overflow output configured to dispense clarified water from the thickener; and a flocculant input and a flocculant dilution input, a thickener controller configured to control an operation of the thickener; and a processor executing a mining operations generated model to issue commands to the thickener controller, based on inputs of sensed conditions, wherein the mining operations model incorporates a thickener sub-model and a material sub-model, wherein the mining operations model is employed to predict a future state of a thickener based on inputs of sensed conditions in the thickener and predictions made by the thickener sub-model and the material sub-model in real time. 1. A mineral recovery system for use in a mining operation , the mineral recovery system comprising: a process water input;', 'an underflow output having an underflow controller configured to adjust outflow of thickened slurry from the thickener;', 'an overflow output configured to dispense clarified water from the thickener; and', 'a flocculant input and a flocculant dilution input;, 'a thickener includinga thickener controller configured to control an operation of the thickener; anda processor executing a mining operations generated model to issue is commands to the thickener controller, wherein the mining operations model incorporates a thickener sub-model and a material sub-model, wherein the mining operations model is employed to predict a future state of the thickener based on inputs of sensed conditions in the thickener and predictions made by the thickener sub-model and the material sub-model in real time.2. The system as set forth in claim 1 , wherein the mining operations model is further employed to predict a plurality of ...

SURFACE-TREATED CALCIUM CARBONATE AND PHYLLOSILICATE AND ITS USE IN WATER PURIFICATION

The invention relates to a process for the purification of water and/or dewatering of sludges and/or sediments, to the use of a combination of a phyllosilicate and a surface-treated calcium carbonate for water purification and/or dewatering of sludges and/or sediments, as well as to the use of a combination of a phyllosilicate and a surface-treated calcium carbonate for reducing the amount of polymeric flocculation aids in water and/or sludges and/or sediments and to a composite material comprising at least one surface-treated calcium carbonate, at least one phyllosilicate and impurities originated from different sources obtainable by said process. 1. A process for the purification of water and/or dewatering of sludges and/or sediments , comprising the following steps of:a) providing water to be purified and/or sludge and/or sediment to be dewatered comprising impurities;b) providing at least one surface-treated calcium carbonate, wherein at least 1% of the accessible surface area of the calcium carbonate is covered by a coating comprising at least one cationic polymer,c) providing at least one phyllosilicate, andd) contacting the water and/or sludge and/or sediment of step a) with the at least one surface-treated calcium carbonate of step b) and the at least one phyllosilicate of step c) for obtaining a composite material comprising the at least one surface-treated calcium carbonate, the at least one phyllosilicate and impurities.2. The process according to claim 1 , wherein the water and/or sludge and/or sediment of step a) is selected from industrial waste water claim 1 , drinking water claim 1 , urban waste water claim 1 , sludge such as harbour sludge claim 1 , river sludge claim 1 , coastal sludge or digested sludge claim 1 , waste water or process water from breweries or other beverage industries claim 1 , waste water or process water in the paper industry claim 1 , colour- claim 1 , paints- claim 1 , or coatings industry claim 1 , agricultural waste water ...

TREATMENT OF OIL SANDS TAILINGS WITH LIME AT ELEVATED PH LEVELS

Methods and systems for treating oil sands tailings streams at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 10-55% solids by total weight, increasing the pH of the tailings stream by combining the tailings stream with lime to produce a lime-tailings mixture having a pH of at least 11.0, and dewatering the lime-tailings mixture to produce a first stream having 10% or less solids by total weight and a second stream having 50% or more solids by total weight. The first stream can correspond to a release water stream, and the second stream can correspond to a cake. The lime slurry can include about 10% lime by total weight, and can comprise lime hydrate, quicklime, or a combination thereof. Dewatering the lime-tailings mixture can include routing the lime-tailings mixture to a centrifuge unit and/or a pressure or vacuum filtration unit. 1. A method for treating oil sands tailings , the method comprising:mixing a tailings stream with a lime additive to produce a lime-tailings mixture having a pH of about 11.0 or greater; anddewatering the lime-tailings mixture to produce a cake including at least 55% solids by total weight.2. The method of wherein the lime-tailings mixture has a pH of about 12.0 or greater.3. The method of wherein the lime tailings mixture has a pH of about 12.5.4. The method of wherein the lime additive is a lime slurry including one or more of hydrated lime claim 1 , quicklime claim 1 , enhanced hydrated lime and dolomitic lime.5. The method of wherein the lime additive includes calcium hydroxide and/or calcium oxide.6. The method of wherein the lime additive includes a lime slurry comprising 10% lime or less by total weight.7. The method of wherein dewatering includes filtering the lime-tailings mixture via pressure or vacuum filtration.8. The method of wherein dewatering includes centrifuging the lime-tailings mixture via a scroll centrifugation unit.9. The method of ...

Aqueous lime slurry, preparation process and uses

Preparation of aqueous slurries of calcium dihydroxide. Preparation of aqueous suspensions of calcium hydroxide.

Tailings Treatment Process

Embodiments relate continuous process for treating tailings that includes providing tailings for treatment having at least 20 wt % solids, providing a mixing apparatus having a first inlet for feeding the tailings, a second inlet for feeding flocculants, an outlet for a mixture of the tailings and flocculants, and a rotating disk, the first inlet being separate from the second inlet, the second inlet being above the rotating disk, and the rotating disk having a tip speed at least 2 m/s, continuously introducing into the mixing apparatus the tailings through the first inlet and the flocculants through the second inlet, allowing the tailings and the flocculants to mix on the rotating disk to form the mixture of the tailings and flocculants, continuously removing the mixture of the tailings and flocculants through the outlet to form a treated mixture, and flowing the treated mixture from the mixing apparatus for further treatment or to a disposal area. 1. A continuous process for treating tailings , the process comprising:providing tailings for treatment having at least 20 wt % solids, based on a total weight of the tailings;providing a mixing apparatus having a first inlet for feeding the tailings, a second inlet for feeding flocculants, an outlet for a mixture of the tailings and flocculants, and a rotating disk, the first inlet being separate from the second inlet, the second inlet being above the rotating disk, and the rotating disk having a tip speed at least 2 m/s;continuously introducing into the mixing apparatus the tailings through the first inlet and the flocculants through the second inlet;allowing the tailings and the flocculants to mix on the rotating disk to form the mixture of the tailings and flocculants;continuously removing the mixture of the tailings and flocculants through the outlet to form a treated mixture; andflowing the treated mixture from the mixing apparatus for further treatment or to a disposal area.2. The process of claim 1 , wherein for ...

METHOD FOR DEWATERING OF SLUDGE FROM A PULP, PAPER OR BOARD MAKING PROCESS

A method is disclosed for dewatering of sludge from a pulp, paper or board making process, such as deinking sludge, including obtaining of an aqueous sludge including an aqueous phase and a fibre material suspended in the aqueous phase. The sludge is subjected to a pre-thickening step, where a first part of the aqueous phase is removed from the sludge and to a pressing step, where a second part of the aqueous phase is removed from the sludge, thereby obtaining a dry pressed sludge. Before or at the pre-thickening step a polymer composition having a charge density of at the most 1.7 meq/g, preferably at most 1.5 meq/g, more preferably at most 1.1 meq/g, is added to the sludge. 1. A method for dewatering of sludge from a pulp , paper or board making process , such as deinking sludge , the method comprising:obtaining an aqueous sludge comprising an aqueous phase and a fibre material suspended in the aqueous phase,subjecting the sludge to a pre-thickening step, wherein a first part of the aqueous phase is removed from the sludge,subjecting the sludge to a pressing step, wherein a second part of the aqueous phase is removed from the sludge and obtaining a dry pressed sludge, andadding to the aqueous sludge before or at the pre-thickening step a polymer composition having a charge density of at the most 1.7 meq/g, preferably at the most 1.5 meq/g, more preferably at the most 1.1 meq/g, and comprising:a cationic synthetic first polymer, which has a charge density at least 1.0 meq/g at pH 2.8, anda cationic second polymer, which is a copolymer obtained by polymerisation of (meth)acrylamide and at least one cationic second monomer, the amount of cationic monomers being 2-19 weight-%, calculated from the total amount of the monomers, the second polymer being polymerised in presence of the cationic first polymer,wherein the first polymer has a higher charge density than the second polymer.2. The method according to claim 1 , wherein the cationic first polymer has charge ...

Anaerobic treatment of industrial wastewater

Feed water is processed in an anaerobic digester. A solid-liquid separation device, for example a sludge screw thickener, treats a stream drawn from the digester in a recirculation loop. The solids portion is returned to the digester to increase the solids retention time and the TSS concentration in the digester. A liquid portion with less than 5% of the solids in the stream is removed and optionally treated further. The flow rate to the solid-liquid separation device is preferably greater than the influent flow rate. The solid-liquid separation device may receive digestate at a TSS concentration of 4% or more and return a solids portion having a TSS concentration of over 10%. The feed water is preferably one or more industrial waste streams having a COD concentration of 20,000 to 50,000 mg/L and a TSS concentration from 1-5%. The organic loading rate may be 10-12 kg/COD/m3/day.

POLYMER FLOCCULANT MIXING AND DISSOLVING SYSTEM, AND METHOD FOR MIXING AND DISSOLVING POLYMER FLOCCULANT

The present invention provide a polymer flocculant mixing and dissolving system and a method for mixing and dissolving a polymer flocculant that can produce a polymer flocculant solution in a short period of time using low power. 1. A polymer flocculant mixing and dissolving system comprising:a mixing tank in which a solid polymer flocculant is mixed with water as a solvent;a liquid feed unit for feeding an aqueous solution containing the mixed polymer flocculant from the mixing tank;a regenerative mixer that comprises a casing arranged at an intermediate position of a channel for the aqueous solution discharged from the liquid feed unit, and a bladed wheel in which grooves are formed in a radial pattern all over an outer circumference, and is used to mix and dissolve the polymer flocculant through pressure application by rotating the bladed wheel in the casing and forming a vortex flow of the aqueous solution along an inner circumferential wall of the casing; anda pressure adjusting unit arranged at an intermediate position of a channel for the aqueous solution that has passed through the regenerative mixer, and controls pressure on a discharge side of the regenerative mixer,wherein the pressure adjusting unit has information regarding a pressure set value determined in association with a type of polymer flocculant, and performs pressure control such that the pressure on the discharge side of the regenerative mixer is applied to a pressure corresponding to the type of polymer flocculant.2. The polymer flocculant mixing and dissolving system according to claim 1 , wherein the regenerative mixers are arranged in series at least two positions in the channel for the aqueous solution discharged from the liquid feed unit claim 1 , the regenerative mixers successively applying pressure to the aqueous solution at the respective positions.3. The polymer flocculant mixing and dissolving system according to claim 2 , further comprising:a power detecting unit for detecting ...

Waste disposal methods

Embodiments of the present disclosure include systems and methods for collecting, storing, separating, and disposing of waste material from an oil and gas well site in order to enhance payload efficiency. An embodiment of a method, for example, may include introducing a waste material into an enhanced-payload mobile vessel positioned at the oil and gas well site, the waste material selected to include one or more of a sludge waste material, a solids-laden wastewater material, and a dry waste material. The method may further include transporting the waste material when positioned in the enhanced-payload mobile vessel along roadways to an off-site waste management facility. Additionally, the method may include dumping the waste material from the enhanced-payload mobile vessel by a site-based lifting mechanism into a receiving vessel at the off-site waste management facility thereby to dispose of the waste material at a reduced transportation cost.

PROCESS TO OBTAIN THIN LAYERS OF DRIED AND CONSOLIDATED MATURE FINES TAILINGS

A process to treat fines tailings generated from mining operations, wherein tailings material is sprayed onto a solid substrate as a thin layer and allowed to dry. The spray may be re-applied on top of the dried tailings film leading to multiple layers of dried tailings solids. The method may yield a solid, dry, and consolidated tailings material. 1. A method for partially dewatering fluid fines tailings , the method comprising the steps of:transporting the fluid fines tailings to a point vertically spaced above a substrate;ejecting the fluid fines tailings at the point into the air above the substrate to form dispersed fines tailings droplets comprising water; andallowing the dispersed fines tailings droplets to contact the substrate with inertial force at a contact velocity, the contact velocity sufficient to cause the dispersed fines tailings droplets to flatten on the substrate and release some of the water, forming partially dewatered fluid fines tailings.2. The method of further comprising a step after step c. of allowing the partially dewatered fluid fines tailings to further dry.3. The method of wherein the further drying is achieved by ambient atmospheric conditions or application of heat to the partially dewatered fluid fines tailings.4. The method of wherein the fluid fines tailings are ejected through a nozzle to atomize the fluid fines tailings and thus form the dispersed fines tailings droplets.5. The method of wherein the point is rotated around a central axis during ejection of the fluid fines tailings to form the dispersed fines tailings droplets claim 1 ,6. The method of wherein the step of ejecting comprises directing the fluid fines tailings generally upwardly.7. The method of wherein the step of ejecting comprises directing the fluid fines tailings generally downwardly.8. The method of wherein the fluid fines tailings are held within a tank and subsequently pumped to the point for ejecting.9. The method of further comprising the steps of: ...

SYSTEM FOR PROVIDING HOMOGENOUS POLYMER-SLUDGE COMPOSITION TO DEWATERING EQUIPMENT

An improved system for providing a homogeneous polymer-sludge composition to dewatering equipment includes an input mechanism that is adapted to receive sludge from a first supply source, and polymer materials from a second supply source. The input mechanism functioning to perform an initial blending of the materials before discharging the same to a pump unit. The pump unit comprising a boundary layer viscous drag pump that functions to efficiently and simultaneously mix and pump the polymer/sludge material to dewatering equipment in a manner that does not shear the polymer or reduce the efficiency, as previously experienced with downstream mixing units. 1: A system for providing a homogeneous polymer-sludge composition to dewatering equipment , said system comprising:a mixing unit having a first input member for receiving sludge, a second input member for receiving polymer, and an output member for discharging a first mixed solution; anda boundary layer viscous drag disc pump that is in fluid communication with the output member of the mixing unit, said pump being configured to pull the first mixed solution from the output member, to perform a second mixing procedure on the first mixed solution, and to supply a second mixed solution to a piece of dewatering equipment.2: The system of claim 1 , wherein the second mixed solution comprises:a homogeneous polymer-sludge composition.3. The system of claim 1 , wherein the second mixed solution comprises:a non-sheared homogeneous polymer-sludge composition.4. The system of claim 1 , wherein the output member of the mixing unit is directly coupled to an input of the pump.5. The system of claim 1 , wherein the output member of the mixing unit is positioned a discrete distance from an input of the pump.6. The system of claim 1 , wherein the mixing chamber includes a central channel for performing a first mixing procedure.7: The system of claim 6 , wherein the central channel comprises a polymer injection ring.8: The system of ...

Control of aqueous arsenic, selenium, mercury or other metals from flue gas

The invention pertains to methods of reducing dissolved elements such as arsenic, selenium and mercury in aqueous solutions using, for example, various barium compounds to partition said elements to a solid phase. Such methods are particularly useful for reducing such elements at various points in coal and oil-fired power plants prior to final waste water treatment.

METHOD AND SYSTEM FOR REDUCING WATER CONTENT IN WATER-AND-SOLID-CONTAINING SUBSTANCE

A method and system for reducing a water content in a substance, comprising: mixing a water-and-solid-containing substance with a liquefied gas solvent creating a mixture and at least part of water in the water-and-solid-containing substance to be extracted into the liquefied gas solvent; separating the mixture into a substance with a decreased water content and a solvent with an increased water content, comprising the liquefied gas solvent and water extracted from the water-and-solid-containing substance; separating the solvent with an increased water content into a liquefied-gas-solvent-rich phase and a water-rich phase by changing a temperature of the solvent with an increased water content, and in a process of changing the temperature, keeping the temperature to be lower than a boiling point of the liquefied gas solvent under a pressure in the process; and returning at least part of the liquefied-gas-solvent-rich phase to be used as a solvent in creating the mixture. 1. A method for reducing a water content in a water-and-solid-containing substance , comprising:(a) mixing the water-and-solid-containing substance with a liquefied gas solvent to obtain a mixture and enabling at least part of water in the water-and-solid-containing substance to be extracted into the liquefied gas solvent;(b) separating the mixture into a substance with a decreased water content and a solvent with an increased water content, the solvent with an increased water content comprising the liquefied gas solvent and water extracted from the water-and-solid-containing substance;(c) separating the solvent with an increased water content into a liquefied-gas-solvent-rich phase and a water-rich phase by changing a temperature of the solvent with an increased water content, and in a process of changing the temperature, keeping the temperature to be lower than a boiling point of the liquefied gas solvent under a pressure in the process; and(d) returning at least part of the liquefied-gas-solvent- ...

PROCESS FOR FLOCCULATING AND DEWATERING OIL SAND MATURE FINE TAILINGS

A process for dewatering oil sand fine tailings is provided and comprises a dispersion and floc build-up stage comprising in-line addition of a flocculent solution comprising an effective amount of flocculation reagent into a flow of the oil sand fine tailings; a gel stage wherein flocculated oil sand fine tailings is transported in-line and subjected to shear conditioning; a floc breakdown and water release stage wherein the flocculated oil sand fine tailings releases water and decreases in yield shear stress, while avoiding an oversheared zone; depositing the flocculated oil sand fine tailings onto a deposition area to form a deposit and to enable the release water to flow away from the deposit, preferably done in a pipeline reactor and managing shear according to yield stress and CST information and achieves enhanced dewatering. 1. A process for producing a hydrocarbon product derived from oil sands ore , the process comprising:forming an aqueous slurry comprising the oil sands ore;subjecting the aqueous slurry comprising oil sands ore to separation to produce a hydrocarbon product and fine tailings comprising water and fine solids; and adding a flocculant solution comprising an effective amount of flocculation reagent in-line into a flow of the fine tailings to cause dispersion of the flocculation reagent and build-up of flocs to form flocculated fine tailings;', 'transporting the flocculated fine tailings in-line and subjecting the flocculated fine tailings to in-line shear conditioning to increase a yield stress thereof to a peak yield stress and produce an in-line flow of a gel stage tailings material;', 'subjecting the gel stage tailings material to further in-line shear conditioning to reduce the yield stress from the peak yield stream and produce an in-line flow of an ungelled flocculated tailings material;', 'discharging the ungelled flocculated tailings material from a pipeline discharge outlet; and', 'allowing the discharged ungelled flocculated ...

ECO-EFFICIENT METHOD FOR MANUFACTURING CONCRETE

The present invention describes a method for manufacturing of a composite fixated material comprising the steps of: (a) providing bottom oil shale ash obtained after burning oil shale, said bottom oil shale (BOSA) comprises pozzolanic particles having size of about 10 to 4000 μm and being capable of adsorbing trace elements at their surface; (b) providing acidic waste comprising said trace elements; and (c) adding the BOSA provided in step (a) to the acidic waste provided in step (b) in amount of about 0.1-0.4 weight parts of said BOSA per one weight part of said waste, and mixing said waste with said BOSA, thereby obtaining a neutralised (scrubbed) precipitate with the fixated trace elements, wherein said neutralised (scrubbed) precipitate with the fixated trace elements constitutes said composite fixated material. 1. A method for manufacturing a composite fixated material comprising:(a) Providing bottom oil shale ash (BOSA), which is obtained after burning oil shale, wherein said BOSA comprises pozzolanic particles having size of about 10 to 4000 μm and being capable of adsorbing trace elements at their surface;(b) Providing acidic waste comprising said trace elements; and(c) Adding the BOSA provided in Step (a) to the acidic waste provided in Step (b) in amount of about 0.1-0.4 weight parts of said BOSA per one weight part of said waste, and mixing said waste with said BOSA, thereby obtaining a neutralised (scrubbed) precipitate with the fixated trace elements, wherein said neutralised (scrubbed) precipitate with the fixated trace elements constitutes said composite fixated material.2. The method of claim 1 , wherein said obtained composite fixated material is a cement-like powder.3. The method of claim 1 , wherein said obtained composite fixated material is a cement-like blendable paste.4. The method of any one of to claim 1 , further comprising the step of transferring said obtained composite fixated material to a site of landfill and allowing it to harden ...

Treatment of sludges and flocculants using insoluble mineral colloidal suspensions

A method of separating sludges which involves adding an insoluble mineral colloidal suspension into an industrial sludge to destabilize the industrial sludge and separating destabilized components of the industrial sludge. The insoluble mineral colloidal suspension can be adding into the industrial sludge or formed in situ therein by components into the industrial sludge that react together therein to form the insoluble mineral colloidal suspension. 1. A method of separating sludges which comprises:obtaining an industrial sludge;adding an insoluble mineral colloidal suspension into the industrial sludge to destabilize the industrial sludge; andseparating destabilized components of the industrial sludge.2. A method of separating sludges according to claim 1 , wherein a flocculant and/or coagulant is added to the industrial sludge to aid in the separation of the destabilized components of the industrial sludge.3. A method of separating sludges according to claim 1 , wherein the insoluble mineral colloidal suspension is added into the industrial sludge by forming the insoluble mineral colloidal in situ in the industrial sludge.4. A method of separating sludges according to claim 1 , wherein the industrial sludge is a waste water sludge.5. A method of separating sludges according to claim 1 , wherein the industrial sludge is refinery sludge.6. A method of separating sludges according to claim 1 , wherein the industrial sludge is a combined bottom sludge and top float.7. A method of separating sludges according to claim 1 , wherein the insoluble mineral colloidal suspension is formed in situ in the industrial sludge by adding components into the industrial sludge that react together therein to form the insoluble mineral colloidal suspension.8. A method of separating sludges according to claim 1 , wherein the insoluble mineral colloidal suspension has a solids percent by weight of at least 25%.9. A method of separating sludges according to claim 8 , wherein the insoluble ...

METHOD OF PRODUCING BIOCHAR FROM SLUDGE

The specification describes a system and process for treating a sludge or slurry to produce biochar. The sludge or in slurry may be digestate produced by an anaerobic digester that receives waste activated sludge from a wastewater treatment plant. In a process, digestate is dosed with metal ions, dewatered, and pyrolized. A corresponding system includes a reactor, a dewatering unit and a pyrolysis unit. In an example, the digestate is air stripped in the reactor and a metal salt is added to it. The metal ions form precipitates in the digestate that remain in the biochar. In some cases, a precipitate such as struvite is formed that also increases the phosphorous content of the biochar. The biochar may be used as a soil amendment, wherein the metal and phosphorous are beneficial to the soil. 1. A process for treating digestate comprising the steps of ,dosing the digestate with metal cations in an amount sufficient to produce a precipitate including the metal cations in the digestate;dewatering the digestate to form a cake such that at least some of the precipitate is retained in the cake; and,pyrolizing the cake to produce biochar.2. The process of wherein a metal salt is added to the digestate.3. The process of wherein the pH of the digestate is increased before it is dewatered.4. The process of wherein the digestate is air stripped before it is dewatered.5. The process of wherein magnesium is added to the digestate and the precipitate is struvite.6. The process of wherein the digestate is produced by anaerobic digestion of a feedstock that includes sewage sludge.7. The process of wherein the sludge is waste activated sludge.8. A system for producing biochar comprising claim 6 ,a precipitation reactor;a dewatering unit; and,a pyrolysis unit.9. The system of wherein the precipitation reactor is comprises an aerated vessel.10. The system of wherein the precipitation reactor includes a supply of a metal salt. This application claims the benefit of U.S. Application Ser. ...

PROCESS FOR TREATING SLUDGE

Process for treating sludge includes a first segment in which a batch of sludge and lime are mixed with the addition of supplement heat to achieve an elevated processing temperature and a second segment in which the mixer is maintained at a lower temperature to dry the interior of the mixing device after processing the batch.

INTEGRATED TREATMENT OF TAILINGS IN OILSANDS MINING OPERATIONS

A method for disposal of Mature Fine Tailings (MFT) from oilsands or other mining operations, comprising: i) providing MFT from a source of MFT; ii) adding a viscosity enhancer to the MFT to increase the viscosity of the MFT; iii) adding a hardening agent to the MFT to increase the strength of said MFT; iv) disposing of the MFT on open ground or underground. Prior to the viscosity enhancement step, the MFT may be thickened by vacuum evaporation, hydrocloning and/or centrifuging. Coarse Sand Tailings (CST) may be added to the MFT prior to disposal step to form a pumpable slurry. 1. A method of disposal of Mature Fine Tailings (“MFT”) from oilsands or other mining operations , comprising:i) providing MFT from a source of MFT;ii) adding a viscosity enhancer to said MFT to increase the viscosity of said MFT;iii) adding a hardening agent to said MFT to increase the strength of said MFT;iv) disposing of said MFT above ground, in ground or underground.2. The method of comprising the further step claim 1 , prior to said viscosity enhancement step claim 1 , of thickening said MFT by vacuum evaporation claim 1 , hydrocloning and/or centrifuging.3. The method of comprising the further step claim 1 , prior to said disposal step claim 1 , of adding additional particulate solids to said MFT to form a pumpable slurry.4. The method of wherein said additional particulate solids comprise Coarse Sand Tailings (“CST”).5. The method of wherein said MFT are provided by being drawn from a tailings pond.6. The method of wherein said viscosity enhancer is selected from the group consisting of bentonite claim 1 , attapulgite claim 1 , and synthetic polymers.7. The method of wherein said hardening agent is selected from the group consisting of cement and lime.8. The method of wherein the amount of said viscosity enhancer which is added to said MFT is about 2-5% by weight equivalence of the fluid phase of said MFT9. The method of wherein the amount of said hardening agent which is added to ...

METHOD FOR TREATING A SUSPENSION OF SOLID PARTICLES IN WATER USING A (CO)POLYMER OF A HYDRATED CRYSTALLINE FORM OF 2-ACRYLAMIDO-2-METHYLPROPANESULFONIC ACID

The present invention relates to a method for the treatment of a suspension of solid particles in water using water-soluble (co)polymers made from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof This method is particularly useful for treating residues resulting from the mining industry. 1. A method for the treatment of a suspension of solid particles in water , comprising the placing of said suspension in contact with at least one water-soluble (co)polymer made from 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof , the 2-acrylamido-2-methylpropane sulfonic acid being a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58° , 11.2° , 12.65° , 13.66° , 16.28° , 18.45° , 20° , 20.4° , 22.5° , 25.5° , 25.88° , 26.47° , 28.52° , 30.28° , 30.8° , 34.09° , 38.19° , 40.69° , 41.82° , 43.74° , and 46.04° degrees.2. The method according to claim 1 , wherein the water-soluble (co)polymer is at the least made from 2-acrylamido-2-methylpropane sulfonic acid claim 1 , 50% to 100% of the 2-acrylamido-2-methylpropane sulfonic acid being in hydrated crystalline form.3. The method according to claim 1 , wherein the 2-acrylamido-2-methylpropane sulfonic acid in hydrated crystalline form is partially or totally salified before polymerization.4. The method according to claims 1 , wherein the water-soluble (co)polymer is made from the hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid or of at least one of the salts thereof claims 1 , and from at least one nonionic monomer claims 1 , and/or at least one anionic monomer claims 1 , and/or at least one cationic monomer and/or at least one zwitterionic monomer.5. The method according to claim 4 , wherein the at least one nonionic monomer is chosen from the group consisting of acrylamide claim 4 , methacrylamide claim 4 , N- ...

TREATMENT OF WASTE PRODUCTS WITH ANAEROBIC DIGESTION

A waste stream is treated by anaerobic digestion. A process is described involves a step of separating solids from digestate, and returning separated solids to a digester. Optionally, there may be a step of solids separation in which larger solids are removed from the digester. A process and apparatus are described for treating waste sludge from a wastewater treatment plant in an anaerobic digester. Feed sludge is thickened or solids are separated from digestate and returned to the digester. Additional co-digestion waste may be added to the digester. The process and apparatus may be used in a retrofit of an existing wastewater treatment plant. 1. A process for treating waste sludge from a wastewater treatment plant comprising the steps of ,a) flowing the waste sludge to an existing anaerobic digester of the wastewater treatment plant; and,b) recuperative thickening digestate in the digester,wherein digestate in the digester is maintained at a solids content of 5% or more.2. The process of further comprising adding an external waste stream to the digester such that at least 30% of the volatile solids loading to the digester is derived from the external waste stream.3. The process of wherein the step of recuperative thickening comprises thickening digestate in a rotary screw press.4. The process of comprising mixing digestate in the digester with a hydraulic mixer.5. The process of comprising mixing digestate in the digester intermittently.6. A process for treating WWTP sludge comprising the steps of claim 1 ,feeding the WWTP sludge at 4% TS or less to an anaerobic digester;operating the anaerobic digester at 5 to 6% TS; and,providing recuperative thickening for the digester by way of a side stream thickener; and,adding a polymeric thickening aid in the side stream.7. The process of wherein waste digestate is dewatered separately from the side stream.8. The process of any of further comprising mixing the digester with a hydraulic mixer.9. The process of comprising ...

Automatic Self-Cleaning Filter Driven by Submersible Actuator

An automatic self-cleaning filter that is driven by a submersible actuator and is configured to clean or filter one or more substances from a liquid. 1. An automatic self-cleaning filter , comprising:an outer chamber having a first distal end and a second distal end, wherein each distal end is opposite to each other;wherein the first distal end of the outer chamber includes a first chamber flange;wherein the second distal end of the outer chamber includes a second chamber flange;a top cover plate connected to or secured to the first chamber flange on the first distal end of the outer chamber;a bottom chamber having a bottom chamber flange, a first outlet and a second outlet;wherein the bottom chamber is connected to or secured to the second chamber flange on the second distal end of the outer chamber;a filter cup;an interconnecting shaft;a brush holder;at least one brush;a submersible actuator;an interconnecting plate for providing support to the filter cup;an interconnecting cup for providing support to the interconnecting plate;a lower cup for supporting the submersible actuator; andan interior chamber within the outer chamber;wherein the second outlet corresponds to the outer chamber and the first outlet corresponds to the interior chamber;wherein a first end of the interconnecting shaft is configured to be coupled to the brush holder via a coupling mechanism and second end of the interconnecting shaft is configured to be coupled to a top end of the submersible actuator via a shaft coupling unit;wherein the top cover plate includes at least one inlet that is configured to receive an unfiltered liquid or substance and to provide access to said unfiltered liquid or substance into the filter cup;wherein the filter cup comprises a receptacle having a base and walls that perpendicularly extend from said base, thereby creating an opening opposite to the base that is configured to receive the unfiltered liquid or substance from the inlet;wherein the base of the ...

Precision Lime Stabilization Sytem and Method for Treatment of Sewage Sludge

A lime stabilization system for treatment of sewage sludge, and method is provided in which dewatered sludge and lime are provided to a mixer. Lime and sludge are mixed to raise the pH during which volatiles are driven off with or without supplemental heat. A forced air draft prevents steam from backing up into the lime supply. The sludge goes to a discharge station via a transfer apparatus, and air containing any dust, odors, steam or ammonia is cleaned via a scrubber. The system is computer-controlled via gravimetric load cells and/or volumetric means. The system includes computer controlled means for dissolving scale resulting from exposure of surfaces to lime, using acid, water or combinations thereof. 1. A precision lime stabilization system for treatment of sewage sludge therein , comprising:(a) means for increasing the solids concentration of the sludge;(b) means for transferring the concentrated sludge to a sludge/lime mixer;(c) means for supplying lime from a lime supply or from a means for feeding lime under controlled supplying conditions; (i) after increasing the solids concentration of the sludge; and', '(ii) prior to increasing the solids concentration of the sludge;, '(d) means for feeding lime from the means for supplying lime to the sludge/lime mixer under any one of the following sequence conditions(e) means for mixing the lime and sludge in the sludge/lime mixer to create a sludge/lime mix and to raise the pH of the sludge/lime mix to a range of about 10 to about 12.5;(f) means for heating the sludge/lime mix to drive off volatiles from the mix;(g) with the sludge/lime mixer being substantially enclosed;(h) means providing a forced air draft to the sludge/lime mixer to prevent steam resulting from the means for heating the sludge/lime mix from backing up to the lime supply;(i) means for transferring the sludge/lime mix from the sludge/lime mixer to a discharge station via a transfer apparatus;(j) means for capturing air containing any of dust, ...

PROCESS FOR THE PURIFICATION OF WATER

The present invention relates to at least one surface-reacted calcium carbonate-comprising mineral material and/or a surface-reacted precipitated calcium carbonate that is/are coated with at least one anionic polymer to obtain a surface-coated calcium carbonate-comprising material as well as to a process for the preparation of the surface-coated calcium carbonate-comprising material. Furthermore, the present invention relates to a process for the purification of water and/or dewatering of sludges and/or suspended sediments and to the use of a surface-coated calcium carbonate-comprising material for water purification and/or dewatering of sludges and/or suspended sediments. 1. A surface-coated calcium carbonate-comprising material , characterized in that the calcium carbonate comprises at least one surface-reacted calcium carbonate-comprising mineral material and/or a surface-reacted precipitated calcium carbonate and the coating comprises at least one anionic polymer.2. The surface-coated calcium carbonate-comprising material according to claim 1 , characterized in that the surface-reacted calcium carbonate-comprising mineral material is a reaction product obtainable by contacting a calcium carbonate-comprising mineral material in an aqueous medium with carbon dioxide and with at least one water soluble acid claim 1 , wherein the carbon dioxide is formed in situ and/or is supplied from an external source.3. The surface-coated calcium carbonate-comprising material according to claim 2 , characterized in that the at least one water soluble acid is selected from:{'sub': a', 'a, 'i) acids having a pKvalue of 0 or less at 20° C. (strong acids) or having a pKvalue from 0 to 2.5 at 20° C. (medium strong acids); and/or'}{'sub': a', 'a, 'ii) acids having a pKof greater than 2.5 and less than or equal to 7 at 20° C. (weak acids), wherein at least one water soluble salt, which in the case of a hydrogen-containing salt has a pKof greater than 7 and the salt anion of which is ...

Effluent Treatment Mixture

A coagulant-flocculant mixture, a method of making such a coagulant-flocculant mixture, and a method of using such a coagulant-flocculant mixture for treating effluent containing particles within an aqueous medium to facilitate separating the particles and the aqueous medium, whereby the coagulant-flocculant mixture includes an amount of coagulant combined with an amount of flocculant. 1. A method of treating effluent containing particles within an aqueous medium , comprising:combining an amount of a coagulant-flocculant mixture with an amount of said effluent to provide contacted effluent and facilitate separating said particles and said aqueous medium;wherein said coagulant-flocculant mixture comprises an amount of coagulant and an amount of flocculant.2. The method of claim 1 , wherein said coagulant comprises an organic coagulant.3. The method of claim 2 , wherein said organic coagulant comprises a cationic coagulant.4. The method of claim 3 , wherein said cationic coagulant comprises polyDADMAC.5. The method of claim 3 , wherein said cationic coagulant comprises poly(epi-DMA).6. The method of claim 3 , wherein said flocculant comprises a nonionic flocculant.7. The method of claim 3 , wherein said flocculant comprises a cationic flocculant.8. The method of claim 7 , wherein said cationic flocculant comprises a cationic polyacrylamide.9. The method of claim 7 , wherein said cationic flocculant has a charge selected from the group consisting of: a low cationic charge claim 7 , a medium cationic charge claim 7 , and a high cationic charge.10. The method of claim 1 , wherein said coagulant-flocculant mixture comprises a solid form.11. The method of claim 10 , wherein said coagulant-flocculant mixture comprises a powder form.12. The method of claim 1 , wherein said coagulant-flocculant mixture comprises a fluid form.13. The method of claim 12 , wherein said coagulant-flocculant mixture further comprises a fluid vehicle.14. The method of claim 13 , wherein said fluid ...

GEOTECHNICAL CHARACTERISTICS OF TAILINGS VIA LIME ADDITION

Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days. 120-. (canceled)21. A method for treating tailings , the method comprising:providing tailings comprising clay and a pH less than 9.0;combining a coagulant comprising calcium hydroxide with the tailings to form a first mixture having a pH of at least 11.5 and a soluble calcium level of no more than 800 mg/L, wherein the pH and soluble calcium level promote pozzolanic reactions to occur within the first mixture;combining a flocculant comprising a polymer with the first mixture to form a second mixture, wherein the polymer includes at least one of a polyacrylamide or a polysaccharide; anddewatering the second mixture to produce a product having a shear strength of at least 1.5 kilopascals (kPa).22. The method of claim 21 , wherein the shear strength of the product is an undrained shear strength that claim 21 , after a period of time of at least two days claim 21 , is at least 1.5 kPa.23. The method of claim 21 , wherein the shear strength of the product is an undrained shear strength that claim 21 , after a period of time of at least two days claim 21 , is at least 5.0 kPa.24. The method of claim 21 , wherein the pH and the soluble calcium level of the first mixture promote pozzolanic reactions such that the clay ...

GEOTECHNICAL CHARACTERISTICS OF TAILINGS VIA LIME ADDITION

Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days. 120-. (canceled)21. A method for treating tailings , the method comprising:providing tailings originating from the extraction of minerals including at least one of copper, iron ore, gold, or uranium, the tailings comprising clay and a pH less than 9.0;combining a coagulant comprising calcium hydroxide with the tailings to form a first mixture having a pH of at least 12.0 and a soluble calcium level of no more than 800 mg/L, wherein the pH and soluble calcium level promote pozzolanic reactions to occur within the first mixture; anddewatering the second mixture to produce a product having a shear strength of at least 1.5 kilopascals (kPa).22. The method of claim 21 , wherein the shear strength of the product is an undrained shear strength that claim 21 , after a period of time of at least two days claim 21 , is at least 1.5 kPa.23. The method of claim 21 , wherein the pH and the soluble calcium level of the first mixture promote pozzolanic reactions such that the clay is converted to calcium silicate hydrates and/or calcium aluminum hydrates.24. The method of claim 21 , wherein the combination of the coagulant does not produce gaseous carbon dioxide as a byproduct.25. The method of claim 21 , wherein combining the ...

Amphoteric polymer, process for production thereof, and use thereof, to treat aqueous dispersions

A polymer formed from a monomer mixture comprising, (a) from 77 to 88 mol % of acrylamide or methacrylamide; (b) from 11.9 to 18 mol % of 2-acrylamido-2-methylpropane sulphonic acid, or salts thereof; and (c) from 0.1 to 5 mol % of a quarternary ammonium salt of dimethylaminoethyl acrylate or dimethylaminoethyl methacrylate, in which the quaternary ammonium salt of the monomer component (c) is the methyl chloride salt or dimethyl sulphate salt, preferably the methyl chloride or dimethyl sulphate quaternary ammonium salt of dimethylaminoethyl acrylate, more preferably the methyl chloride quaternary ammonium salt of dimethylaminoethyl acrylate, and in which the polymer has a reduced specific viscosity of at least 5 dL/g. The invention also provides a process for preparing this polymer and also a process for treating an aqueous slurry comprising particulate material employing said polymer.

RAPID STIRRING MACHINE

A rapid stirring machine including a tank for stirring sludge and a flocculant; a drive shaft disposed in the tank; and an edged turbine blade attached to the drive shaft, the edged turbine blade including turbine blades that are disposed along a virtual circle centered around the axis of the drive shaft, on at least one of the front and back sides of the edged turbine blade in the axial direction of the drive shaft, the turbine blades being raised in the axial direction of the drive shaft. 1. A rapid stirring machine comprising:a tank for stirring sludge and a flocculant;a drive shaft disposed in the tank; anda shearing stirring blade attached to the drive shaft, wherein the shearing stirring blade includes turbine blades that are disposed along a virtual circle centered around an axis of the drive shaft, on at least one of front and back sides of the shearing stirring blade in an axial direction of the drive shaft, the turbine blades being raised in the axial direction of the drive shaft.2. The rapid stirring machine according to claim 1 , wherein the turbine blades are disposed along a tangential direction of the virtual circle centered around the axis of the drive shaft.3. The rapid stirring machine according to claim 1 , wherein the shearing stirring blade has a rotating plate that integrally rotates with the drive shaft claim 1 , and the turbine blades are radially disposed on an outer edge of the rotating plate.4. The rapid stirring machine according to claim 3 , wherein the shearing stirring blade is an edged turbine blade.5. The rapid stirring machine according to claim 1 , wherein the shearing stirring blade is disposed at a predetermined distance from a tank bottom so as to have a space between the shearing stirring blade and the tank bottom.6. The rapid stirring machine according to claim 5 , wherein the shearing stirring blade is located so as to face a sludge inlet port.7. The rapid stirring machine according to claim 1 , wherein a ratio of d1 to D1 is ...

METHOD FOR TREATING SLUDGE

It is disclosed a method of treating municipal and/or industrial sludge, comprising the steps of: a) providing the sludge, which has a pH of at least 6; b) adding a catalyst to the sludge; c) adding a radical initiator, selected from hydrogen peroxide and percompounds to the sludge; d) adding a polymer to the sludge to provide a chemically treated sludge; e) dewatering the chemically treated sludge in at least one stage to provide a dewatered sludge cake, wherein step b) and c) may be performed in any order. 1. A method of treating municipal and/or industrial sludge comprising the steps of:a) providing the sludge, which has a pH of at least 6;b) adding a catalyst to said sludge;c) adding a radical initiator, selected from hydrogen peroxide and percompounds, to said sludge;d) adding a polymer to said sludge to provide a chemically treated sludge;e) dewatering said chemically treated sludge in at least one stage to provide a dewatered sludge cake,wherein step b) and c) may be performed in any order.2. The method according to claim 1 , wherein the catalyst is selected from metals salts of the group consisting of salts of iron claim 1 , copper claim 1 , manganese claim 1 , titanium claim 1 , cobalt claim 1 , aluminium claim 1 , and cerium claim 1 , and any combination thereof claim 1 , preferably selected from the group consisting of salts of copper(II) claim 1 , ferrous and ferric iron.3. The method according to claim 2 , wherein the metals salts are selected from the group chlorides claim 2 , sulfates and oxides claim 2 , and any combination thereof.4. The method according to claim 2 , wherein the metals salts are selected from the group consisting of iron sulfate claim 2 , iron chloride claim 2 , iron oxide claim 2 , copper chloride claim 2 , copper sulfate claim 2 , cobalt chloride claim 2 , manganese oxide claim 2 , titanium oxide claim 2 , aluminium oxide claim 2 , cerium oxide claim 2 , and any combination thereof.5. The method according to - claim 2 , wherein ...

METHOD AND FACILITY FOR THE FORCED DEWATERING OF A SLUDGE OF SALINE RESIDUES

A method for the forced dewatering, by pressing, of saline residues produced by drinking water production, or by the treatment of municipal or industrial wastewaters, in which method the saline residues are introduced into the cylinder () of a piston press () comprising flexible drains () formed by flexible sheaths from a material that is permeable to liquid but impermeable to solids, each drain () comprising an inner passage that opens into an associated opening (), the press operating in batches, and characterised in that during pressing, the piston carries out reciprocal movements and applies alternating and variable pressures to the sludge, while the flexible drains are deformed, the liquid pressed out from the product passing through the wall of the drains and being discharged as a filtrate, while the dewatered sludge remains outside the drains and is discharged by opening the press. 1. A process for the extensive dewatering , by pressing , of saline residues resulting from drinking water production , or from treatment of municipal or industrial wastewaters , comprising introducing the saline residues into the cylinder of a piston press comprising flexible drains formed by flexible sheaths made from a material that is permeable to liquid but impermeable to solids , each drain comprising an inner passage that opens into an associated opening , the press operating in batches , wherein during the pressing , the piston carries out reciprocal movements and applies alternating and variable pressures to the sludge , while the flexible drains are deformed , the liquid pressed out of the product passing through the wall of the drains and being discharged as a filtrate , while the dewatered sludge remains outside the drains and is discharged by opening the press.2. The process as claimed in claim 1 , wherein the produced sludge leaving the press has a dryness of greater than 30% claim 1 , preferably greater than 35%.3. The process as claimed in claim 1 , wherein an ...

SLUDGE DEHYDRATION SYSTEM AND SLUDGE DEHYDRATION METHOD

A sludge dehydration method includes a recovery process of recovering specific material as a dewatering aid from sludge generated in a sewage treatment process and a dewatering process of performing solid-liquid separation on sludge in which the dewatering aid recovered in the recovery process and dewatering target sludge are mixed. 1. A sludge dehydration system comprising:a recovery device configured to recover specific material as a dewatering aid from sludge generated in a sewage treatment process; anda dewaterer configured to perform solid-liquid separation on sludge in which the dewatering aid recovered by the recovery device and dewatering target sludge are mixed.2. The sludge dehydration system according to claim 1 , wherein a grinder configured to fragment a solid in the sludge to obtain prepared sludge;', 'a separator configured to separate hardly decomposable organic matter and easily decomposable organic matter from the prepared sludge; and', 'an extractor configured to continuously extract hardly decomposable organic matter having specific properties as the dewatering aid from the hardly decomposable organic matter separated by the separator., 'the recovery device comprises3. The sludge dehydration system according to claim 1 , further comprising a recovery tank configured to store the dewatering aid extracted by the extractor.4. The sludge dehydration system according to claim 1 , wherein the dewatering target sludge is one of OD excess sludge or digested sludge being sludge in which fiber components are reduced.5. The sludge dehydration system according to claim 1 , further comprising:a supply device configured to supply the dewatering aid to the dewatering target sludge; anda control device configured to adjust a supply amount of the dewatering aid supplied by the supply device, calculate a predicted total recovery amount of the dewatering aid to be recovered in a continuous predetermined period set in advance by the recovery device,', 'calculate a ...

Filtration Aid and Filtration Treatment Method

Provided is a filtration aid used when filtering, for example, sludge generated in a purification treatment process for water such as industrial wastewater and including a pulverized product of wherein a median diameter of the pulverized product is 150 micrometers or greater. 1. A filtration aid , comprising:{'i': 'Corchorus olitorius,', 'a pulverized product of'}wherein a median diameter of the pulverized product is 150 micrometers or greater.2. The filtration aid according to claim 1 ,{'i': 'Corchorus olitorius', 'wherein the is “intermediate jute No. 4” under nationally identified hemp 2013, which is an identification number in Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences.'}3. The filtration aid according to claim 1 ,{'i': 'Corchorus olitorius', 'wherein the is “intermediate jute No. 1” under XPD005-2005, which is an identification number in Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences.'}4. The filtration aid according to claim 1 ,{'i': 'Corchorus olitorius', 'img': {'@id': 'CUSTOM-CHARACTER-00004', '@he': '3.22mm', '@wi': '11.26mm', '@file': 'US20180111110A1-20180426-P00001.TIF', '@alt': 'custom-character', '@img-content': 'character', '@img-format': 'tif'}, 'wherein the is “intermediate kenaf” under No. 1209001, which is an identification number in Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences.'}5. The filtration aid according to claim 1 ,wherein the filtration aid is used when filtering sludge generated in a purification treatment process for wastewater including an inorganic unnecessary substance.6. A filtration treatment method for insolubilizing an inorganic ion contained in an inorganic unnecessary substance included in wastewater to form a microfloc claim 1 , which is a suspended solid matter claim 1 , in the wastewater including the inorganic unnecessary substance claim 1 , and filtering the wastewater including the microfloc claim 1 , the filtration treatment method ...

FEEDBACK LOOP FOR SLUDGE FILTERING

Provided is a filtration system and process that enhances mineral removal from sludge through a novel recirculation and mixing apparatus. In one example, the system may include a filter configured to remove minerals from sludge, a pump configured to move the sludge towards the filter, a pre-filtering system configured to add an agent into the sludge prior to the sludge making contact with the filter, a drainage collection system including one ore more reservoirs configured to collect water drained during and/or after the filtering and feedback the drained water to the pump, and valving configured configured to mix the drained water with the sludge to generate a mixture which is moved by the pump towards the filter. 1. A filtration system comprising:a filter configured to remove minerals from sludge;a pump configured to move the sludge towards the filter;a pre-filtering system configured to add an agent into the sludge prior to the sludge making contact with the filter;a drainage collection system configured to collect water drained during and/or after the filtering and feedback the drained water to the pump; anda valve configured to mix the drained water with the sludge to generate a mixture which is moved by the pump towards the filter.2. The filtration system of claim 1 , wherein the filter comprises a gravity belt thickener that includes a filter belt which captures the minerals from the sludge based on gravitational force.3. The filtration system of claim 1 , wherein the drainage collection system comprises a first reservoir configured to receive water drained by the filter from the sludge and a second reservoir configured to receive water drained by a pressurized device from the filtered sludge.4. The filtration system of claim 3 , wherein the second reservoir is configured to feedback the water drained by the pressurized device to the valve for mixing with the sludge.5. The filtration system of claim 3 , wherein the first reservoir is configued to pump ...

System for providing homogenous polymer-sludge composition to dewatering equipment

An improved system for providing a homogenous polymer-sludge composition to dewatering equipment includes an input mechanism that is adapted to receive sludge from a first supply source, and polymer materials from a second supply source. The input mechanism functioning to perform an initial blending of the materials before discharging the same to a pump unit. The pump unit comprising a boundary layer viscous drag pump that functions to efficiently and simultaneously mix and pump the polymer/sludge material to dewatering equipment in a manner that does not shear the polymer or reduce the efficiency, as previously experienced with downstream mixing units.

METHOD FOR CONTROLLING RAPID STIRRER, AND RAPID STIRRER

In a rapid stirrer that stirs sludge and a flocculant in a tank with a stirring blade, the rotation speed of the stirring blade is increased at a set rate with an increase in the amount of charged sludge, the rotation speed of the stirring blade is reduced at the set rate with a decrease in the amount of charged sludge, and flocculated flocs having a fixed floc diameter are stably generated even when operating conditions change so as to fluctuate the amount of charged sludge. 1. A method for controlling a rapid stirrer that stirs sludge and a flocculant in a tank with a stirring blade , the method comprising the steps of:increasing a rotation speed of the stirring blade at a set rate with an increase in an amount of charged sludge or an amount of a solid;reducing the rotation speed of the stirring blade at the set rate with a decrease in the amount of charged sludge; andstably generating flocculated flocs with a fixed floc diameter even when operating conditions change so as to fluctuate the amount of charged sludge.2. A method for controlling a rapid stirrer that stirs sludge and a flocculant in a tank with a stirring blade , the method comprising the steps of:increasing a rotation speed of the stirring blade at a set rate with an increase in an amount of charged flocculant;reducing the rotation speed of the stirring blade at the set rate with a decrease in the amount of charged flocculant; andstably generating flocculated flocs with a fixed floc diameter even when operating conditions change so as to fluctuate an amount of charged sludge.3. A rapid stirrer comprising:a rapid stirring tank for stirring sludge and a flocculant;a stirrer having a stirring blade that rotates around an axis of a drive shaft disposed in the rapid stirring tank;a sludge supply system that supplies sludge into the rapid stirring tank;a flocculant supply system that charges the flocculant into sludge to be supplied into the rapid stirring tank; anda stirrer controller that controls a ...

EMANCIPATIVE WASTE ACTIVATED SLUDGE STRIPPING TO REMOVE INTERNAL PHOSPHORUS ("eWASSTRIP")

A method of treating a mixture of microorganisms containing phosphorus and magnesium, by first inducing the mixture microorganisms to release phosphorus and magnesium. Next an emancipation or elutriation is performed. Phosphorus and magnesium-rich liquid is then tapped off as the mixture is thickened, to produce phosphorus and magnesium-rich liquid and phosphorus and magnesium-reduced treated mixture. This treated mixture is placed in an anaerobic digester where ammonia is formed but combines very little with phosphorus or magnesium as these elements have been reduced in concentration. Then the high-ammonia mixture is dewatered, to produce an ammonia-rich liquid, which is combined with the phosphorus and magnesium-rich liquid. In one preferred example a useable struvite product is harvested from this combination. Additionally, the production of nuisance struvite in the anaerobic digester is reduced, in comparison with prior art waste treatment methods.

METHOD AND SYSTEM FOR DRYING MINE TAILINGS

A method and system to treat and dry fines tailings generated from mining operations, comprising spraying the tailings material into a vacuum chamber operated at less than atmospheric pressure to separate evaporated water from the residual solid materials. 1. A method for at least partially drying tailings materials from a mining operation , the tailings materials comprising water and solids , the method comprising the steps of:a. generating droplets of the tailings materials;b. introducing the droplets into a partial vacuum environment; andc. allowing at least some of the water in the droplets to evaporate to produce a water vapour and a solids-dominant residual material.2. The method of wherein the step of generating droplets is achieved by spraying.3. The method of wherein the spraying is atomizing.4. The method of further comprising the step after step c. of extracting the water vapour from the partial vacuum environment and allowing the water vapour to condense into liquid water.5. The method of further comprising the step after step c. of extracting the solids-dominant residual material from the partial vacuum environment.6. The method of further comprising introducing at least one chemical additive to the tailings materials before the step of generating the droplets.7. The method of wherein the at least one chemical additive is selected from the group consisting of gases claim 6 , salt solutions claim 6 , acids claim 6 , bases claim 6 , polymers and flocculants.8. The method of further comprising the step of heating the tailings materials before the step of generating the droplets.9. The method of further comprising the step of heating the partial vacuum environment.10. The method of further comprising transporting the tailings materials from a storage pond prior to generating the droplets.11. The method of further comprising obtaining the tailings materials directly from an extraction process.12. The method of further comprising the step after step c. of ...

Enhanced flocculation of intractable slurries using silicate ions

Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.

APPARATUS AND METHOD FOR TREATING SLURRIES

An apparatus for treating slurries, in particular biogenic or industrial slurries, can include at least one treatment rotor which is arranged or can be arranged in the slurry and which rotates or is rotatable about an axis of rotation (R), with treatment elements which project outward, as seen from the axis of rotation (R), and between which interspaces are formed, at least some of the treatment elements having, at—at least one, preferably each—adjacent interspace, in each case at least one treatment edge, preferably at least two treatment edges spaced apart from one another, each of these treatment edges running from the inside outward, as seen from the axis of rotation. Methods for treating slurries are also disclosed, including methods using the apparatus for treating slurries. 1. (canceled)2. (canceled)3. A method for mixing a conditioning agent into a slurry , the method comprising the steps of:placing a treatment rotor rotatable about an axis of rotation into the slurry, the treatment rotor having first and second treatment elements projecting outward from the axis of rotation, the first and second treatment elements defining an interspace between the first and second treatment elements;introducing the conditioning agent from the treatment rotor into the slurry;rotating the treatment rotor about the axis of rotation; anddirecting the slurry and the conditioning agent into the interspace via the rotation of the treatment rotor, wherein the slurry and the conditioning agent are first directed along a first region of the interspace increasing in width and subsequently directed along a second region of the interspace decreasing in width, the width of the interspace measured in a direction parallel to the axis of rotation, and wherein directing the slurry and the conditioning agent along the first region and then the second region intensifies mixing of the conditioning agent into the slurry.4. The method of claim 3 , further comprising separating a liquid from ...

SEPARATION OF SUSPENSIONS OF SOLIDS EMPLOYING WATER SOLUBLE POLYMER AND A CHEMICAL AGENT

A process of separating a suspension of particulate solids dispersed in an aqueous liquid into a liquid portion and a solids portion by transferring the suspension by flowing it to a deposition area, subjecting the suspension to a treatment system during the transfer, and at the deposition area allowing the suspension to separate into the liquid portion and the solids portion, in which the treatment system contains 1. A process of separating a suspension comprising particulate solids dispersed in an aqueous liquid into a liquid portion and a solids portion comprising transferring the suspension by flowing it to a deposition area , subjecting the suspension to a treatment system during the transfer , and at the deposition area allowing the suspension to separate into the liquid portion and the solids portion , (a) a water soluble polymer; and', '(b) a chemical agent selected from at least one of an oxidising agent, a reducing agent, and/or a free radical agent., 'wherein the treatment system comprises,'}2. The process according to in which the water soluble polymer is formed from at least one ethylenically unsaturated water-soluble monomer.3. The process according to in which the water-soluble polymer is formed from at least one monomer selected from the group consisting of (meth) acrylic acid (or a salt thereof) claim 1 , allyl sulphonic acid (or a salt thereof) claim 1 , and 2-acrylamido-2-methyl propane sulphonic acid (or a salt thereof) claim 1 , optionally in combination with at least one comonomer selected from the group consisting of (meth) acrylamide claim 1 , hydroxy alkyl esters of (meth) acrylic acid claim 1 , N-vinyl pyrrolidone claim 1 , vinyl amides claim 1 , and vinyl carboxylates.4. The process according to in which the water soluble polymer is formed from at least one monomer selected from the group consisting of (meth) acrylamide claim 1 , hydroxy alkyl esters of (meth) acrylic acid claim 1 , N-vinyl pyrrolidone claim 1 , vinyl amides claim 1 , and ...

SLUDGE SEPARATION DEVICE AND METHOD FOR ITS USE

A device for dewatering sewage sludge and a method for its use is provided. The device affords separation by causing a sludge concentrate to flow as sufficiently slow rates to cause the gel-like concentrate to fracture and release trapped water. Sewage sludge dewatered according to the method and utilizing the device can be directly burned or directly introduced into a landfill. Certain embodiments of the device can be transported to a site where the dewatering process is carried out and certain embodiments of the device can be further utilized to transport dewatered sludge from the dewatering site to a further disposal site. 1. A method for dewatering a colloid comprising:(a) providing an aqueous colloidal mixture; (i) an outer circumference;', '(ii) a horizontal axis of rotation;', '(iii) an inner porous region positioned about the horizontal axis of rotation wherein the porous region has first and second ends;', '(iv) first and second nonporous end pieces positioned at first and second ends of the porous region;', '(v) a first orifice associated with the first end piece for the introduction of the colloid mixture and a flocculant and for the removal of dewatered colloid; and', "(vi) a drive mechanism positioned between the first and second end pieces in contact with the vessel's outer circumference between the end pieces capable of causing continued rotation of the vessel at a rate of ≤about 4 revolutions per hour; and"], '(b) adding the aqueous colloidal mixture and a flocculant, with mixing, to a vessel having(c) rotating the vessel about the horizontal axis of rotation to cause the water to pass through the porous surface to initially produce a moist solid that tumbles and crumbles inside the vessel producing a dewatered solid suitable for disposal without further treatment.2. The method of claim 1 , wherein rotating the vessel about the horizontal axis of rotation involves rotating the vessel in a continuous single direction.3. The method of claim 1 , wherein ...

EMULSION-TYPE WATER-BASED DETERGENT FOR OILY SLUDGE, PREPARATION METHOD AND USE METHOD THEREOF

The present invention discloses an emulsion-type water-based detergent for oily sludge, and a preparation method and use method thereof. The emulsion-type water-based detergent includes components in the following mass percentage contents: 2-10 parts of surfactant, 3-10 parts of oil-soluble component and the balance being aqueous phase, based on 100 parts by weight. The preparation method includes: stirring the surfactant, the oil-soluble component and the aqueous phase to mix uniformly to obtain a homogeneous and stable emulsion-type water-based detergent at room temperature. During use, the oily sludge is first mixed with the emulsion-type water-based detergent and stirred under a certain temperature; mixture is subjected to oil-water-solid three-phase separation after the washing is completed; and at last, solid phase is rinsed with hot water under the same temperature. 1. An emulsion-type water-based detergent for oily sludge , comprising 2-10 parts of surfactant , 3-10 parts of oil-soluble component and the balance being aqueous phase , based on 100 parts by weight.2. The emulsion-type water-based detergent for the oily sludge according to claim 1 , wherein the surfactant comprises sodium fatty alcohol-polyoxyethylene ether sulfate (AES) and super-amphiphilic molecular emulsifier claim 1 , and the mass ratio of the AES to the super-amphiphilic molecular emulsifier is 1:4-4:1.3. The emulsion-type water-based detergent for the oily sludge according to claim 1 , wherein the surfactant comprises the AES and the super-amphiphilic molecular emulsifier claim 1 , and the mass ratio of the AES to the super-amphiphilic molecular emulsifier is 1:1-2:1.4. The emulsion-type water-based detergent for the oily sludge according to claim 1 , wherein the oil-soluble component is methylbenzene claim 1 , dimethylbenzene claim 1 , mixed benzene claim 1 , diesel oil claim 1 , paraffin oil or gas-to-liquid.5. The emulsion-type water-based detergent for the oily sludge according to ...

Compositions for Conditioning Sludge

Composition for conditioning sludge, comprising a mineral compound that is lime and an organic compound that is a cationic organic coagulant having an average molecular weight less than or equal to 5 million g/mol and greater than or equal to 20,000 g/mol, the said cationic organic coagulant being chosen from the group of linear or branched polymers based on diallyldialkyl ammonium salts. 1. Sludge conditioning composition comprising a mineral compound and an organic compound , wherein said mineral compound is lime and said organic compound is selected from the group consisting of linear or branched polymers based on diallyl dialkyl ammonium salts , characterized in that said organic compound is a cationic organic coagulant having an average molecular weight less than or equal to 5 million g/mol and greater than or equal to 20 ,000 g/mol , present in a quantity ranging from 3 g to 100 g for 1 kg of lime expressed as a slaked lime Ca(OH)equivalent , said composition being in the form of an homogeneous and stable mixture of lime and said coagulant before being introduced for conditioning sludge and in that said composition is in a stable suspension form , wherein said lime is slaked lime in the form of a milk of lime , and forms with said organic coagulant a stable suspension.2. Composition according to claim 1 , in which the said cationic organic coagulant has a cationic charge greater than or equal to 4 meq/g and less than or equal to 10 meq/g.4. Composition according to claim 3 , in which the said polymer is a diallyl dimethyl ammonium chloride polymer.5. Composition according to claim 4 , in which the said linear or branched polymer based on diallyldialkyl ammonium salts is a copolymer and comprises one or more other monomers selected from the group consisting of non-ionic monomers claim 4 , including acrylamide claim 4 , methacrylamide claim 4 , N-vinyl pyrrolidone claim 4 , vinyl acetate claim 4 , vinyl alcohol claim 4 , acrylate esters claim 4 , allyl alcohol ...

UNIT FOR TREATING A DRILLING MUD AND CORRESPONDING METHOD

A drilling mud treatment unit () comprises a primary duct () for feeding coagulated drilling mud, an in-line flocculation system () for flocculating the coagulated drilling mud flowing in the primary duct (), and at least one hydrocyclone () fed by the primary duct () and arranged downstream from the flocculation system (). The hydrocyclone () has an overflow orifice () for receiving a liquid product resulting from treatment of the drilling mud and an underflow orifice () for receiving a solid product resulting from treatment of the drilling mud. The overflow orifice () presents an overflow diameter (Do) and the underflow orifice presents an underflow diameter (Du), and the underflow diameter (Du) is greater than 1.1 times the overflow diameter (Do). 110-. (canceled)11. A drilling mud treatment unit comprising:a primary duct for feeding previously coagulated drilling mud;an in-line flocculation system for flocculating the previously coagulated drilling mud flowing in the primary duct; andat least one hydrocyclone fed by the primary duct and arranged downstream from the flocculation system, the hydrocyclone having an overflow orifice for receiving a liquid product resulting from treatment of the drilling mud and an underflow orifice for receiving a solid product resulting from treatment of the drilling mud, the overflow orifice presenting an overflow diameter and the underflow orifice presenting an underflow diameter, and the underflow diameter being greater than the overflow diameter, with a ratio greater than 1.1 between the underflow diameter and the overflow diameter.12. The treatment unit according to claim 11 , wherein the primary feed duct is provided with a pump claim 11 , and the in-line flocculation system includes a secondary duct for feeding flocculating agent claim 11 , said secondary duct being connected to the primary duct at a junction situated downstream from the pump.13. The treatment unit according to claim 12 , wherein the in-line flocculation ...

METHOD FOR CONTROLLING THE SEDIMENTATION OF A MINING DERIVATIVE

The invention relates to a method for controlling the sedimentation of an aqueous mineral suspension of a mining derivative by means of the gravimetric concentration of the aqueous suspension in the presence of a flocculating agent and a polymer (P) which has a GPC-measured molecular mass Mw of between 2000 and 20000 g/mol and is prepared using at least one free radical polymerisation reaction of at least one anionic monomer (M). 1. A method for controlling a settling of an aqueous mineral suspension comprising a flocculating agent and with a dry solids content that is greater than 10% by weight of the aqueous mineral suspension , selected from the group consisting of:an aqueous metal ore residue,an aqueous suspension of metal ore andan aqueous suspension of useable metal or of a useable metal derivative and derived from metal ore,{'sup': II', 'III', 'I', 'II, 'the method comprising gravimetrically concentrating the aqueous suspension in the presence of at least one polymer (P) with a molecular mass Mw, measured by GPC, ranging from 2,000 to 20,000 g/mol and prepared by at least one radical polymerisation reaction, at a temperature greater than 50° C., of at least one anionic monomer (M) comprising a polymerisable olefinic unsaturation and a carboxylic acid group or one of its salts, in the presence of at least one radical-generating compound selected from the group consisting of hydrogen peroxide, benzoyl peroxide, acetyl peroxide, laurel peroxide, tert-butyl hydroperoxide, cumene hydroperoxide, ammonium persulphate, an alkaline metal persulphate, an azo compound and their respective combinations or associations with an ion selected from the group consisting of Fe, Fe, Cu, Cuand mixtures thereof.'}2. The method according to claim 1 , wherein the aqueous mineral suspension has a dry solids content:greater than 15% by weight;greater than 10% by weight and less than 20% by weight; andranging from 10 to 50% by weight.3. The method according to claim 1 , wherein the ...

METHOD AND APPARATUS FOR CLEANING LARGE PIPES, SUCH AS STORM DRAIN CONDUITS

Apparatuses and methods for cleaning accumulated sediment from storm drain conduits and other large-diameter conduits are disclosed. A nozzle assembly is arranged to deliver a high-volume flow of water at a pressure high enough to loosen sediment from the interior of a conduit and to propel the nozzle assembly and an associated nozzle feed hose upstream within a conduit being cleaned. Water from the nozzle assembly flushes the sediment downstream and is then collected, partially cleaned, and reused in the nozzle assembly. Mud and clay may be left in the water to increase its specific gravity and viscosity. A self-contained portable and mobile system includes a tank and apparatus for removal of high concentrations of entrained or suspended solids, and a pump and conduits for delivering a high-volume flow of water, containing quantities of suspended solids, to the nozzle assembly. 1. A method of cleaning large pipe , comprising:providing enhanced water that has a specific gravity of at least 1.05 and a viscosity such that the enhanced water does not pass through a static #20 mesh screen but at least partially passes through a vibrating #20 mesh screen; anddischarging a quantity of the enhanced water through a nozzle assembly and directed toward a quantity of accumulated sediment in a segment of pipe to be cleaned such that the quantity of accumulated sediment is loosened and suspended solids are generated from at least a portion of the loosened sediment.2. The method of claim 1 , wherein providing enhanced water includes:blocking a downstream end of the segment of pipe to be cleaned;removing water and loosened sediment from the pipe being cleaned, at the downstream end of the segment of pipe being cleaned; andstoring at least a portion of the removed water and suspended solids from the loosened sediment with the enhanced water in a container, thereby increasing the specific gravity of enhanced water in the container to at least 1.05 and increasing the viscosity of the ...

Sludge drying system

Disclosed therein is a sludge drying system which dries organic sludge generated in industrial sites or domestic sewage treatment plants by mixing the sludge with heat transfer oil, thereby contributing to improvement of drying efficiency. The sludge drying system includes: a preprocessing part including a sludge supplying part, a transfer oil storage tank, a recoverable oil storage tank, and a preheating and mixing tank; a drying part including first to fourth drying parts respectively having first to fourth vacuum drying pipes, and first to fourth liquid-vapor separators and first to fourth condensers, and a controlling part having first and second vacuum drying control pipes, fifth and sixth liquid-vapor separators and fifth and sixth condensers; and a post-processing part having a feeding tank, a centrifugal oil extractor, and a dried sludge storage tank.

WATER SOLUBLE CROSS-LINKED BLOCK COPOLYMERS

The invention provides new water soluble polymers for the use in industrial processes, where large quantities of water is handled, such as sludge dewatering and papermaking. These new polymers are water soluble cross-linked block copolymers, wherein the block copolymers are cross-linked together using a cross-linking agent. Each of the block copolymers contain two different blocks, and these blocks are formed from different monomers. The blocks are linked together with a molecular spacer derived from a bifunctional initiator used during the polymerization of the blocks. The monomers used in polymerizing the blocks are different with each other and they are selected from a group consisting of N-vinylformamide, acrylic acid, acrylamide and water-soluble derivatives thereof. 1. A water soluble cross-linked block copolymer comprising block copolymers cross-linked together using a cross-linking agent , and whereini. each of the block copolymers contain a first block and a second block, and the first and the second block are formed from different monomer compositions,ii. the first and second blocks are linked together with a molecular spacer derived from a bifunctional initiator used during the polymerization of said blocks, andiii. the monomer compositions used in forming the first and second blocks contain one or more monomers selected from a group comprising water-soluble non-ionic, cationic or anionic (meth)acrylic monomers, cationic non-acrylic monomers, itaconic acid, and N-vinylformamide, and derivatives thereof.2. The water soluble cross-linked block copolymer according to claim 1 , wherein the one or more monomers are selected from a group comprising (meth) acrylamide claim 1 , N-methylolacrylamide claim 1 , N-methylolmethacrylamide claim 1 , (meth)acrylic acid claim 1 , methyl acrylate claim 1 , ethyl acrylate claim 1 , butyl acrylate claim 1 , 2-ethylhexyl acrylate claim 1 , lauryl acrylate claim 1 , 2-hydroxyethyl acrylate claim 1 , 2-hydroxypropyl acrylate ...

SLUDGE DRYING COMPOSITE CONDITIONER AND APPLICATION METHOD THEREOF

Provided is a sludge drying composite conditioner. The sludge drying composite conditioner comprises a Fenton's reagent or/and Fenton-like reagent and a matrix construct, the weight ratio between the Fenton's reagent or/and the Fenton-like reagent and the matrix construct is 1:0.05 to 300, and the matrix construct is powder. Further provided is an application method of the sludge drying composite conditioner, which comprises the steps of: adding a Fenton's reagent or/and Fenton-like reagent in a sludge, performing stirring and mixing, and performing an oxidation reaction; and adding a matrix construct to the sludge added with the Fenton's reagent or/and Fenton-like reagent and performing stirring and mixing. For the sludge drying composite conditioner, through the coordinated effect of the Fenton's reagent or/and Fenton-like reagent and the powder matrix construct, the extracellular polymeric substances in the sludge are effectively damaged, the compressibility of organic matter is reduced, and the drying performance of sludge is improved. The application method thereof has a simple working process and easily controllable conditions and reduces the drying time for sludge, thereby achieving large-scale treatment of sludge. 1. A sludge dewatering composite conditioner comprising a Fenton's reagent and/or Fenton-like reagent and a skeleton builder , wherein the weight ratio of the Fenton's reagent and/or the Fenton-like reagent to the skeleton builder is 1:0.05 to 300 , and the skeleton builder is in the form of powder.2. The sludge dewatering composite conditioner of claim 1 , wherein the Fenton's reagent comprises the following components:{'sub': 2', '4', '3', '3, 'the first component: one or more selected from the group consisting of HCl, HSO, HNOand CHCOOH;'}{'sub': 2', '4, 'the second component: FeCland/or FeSO;'}{'sub': 2', '2, 'the third component: HO;'}wherein, on the basis of the dry weight of the sludge, the amount of the second component is 0.5% to 50% by ...

HYDRATED CRYSTALLINE FORM OF 2-ACRYLAMIDO-2-METHYLPROPANE SULFONIC ACID

The present invention relates to a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, 46.04° degrees (+/−0.1°). 1. A (co)polymer of 2-acrylamido-2-methylpropanesulfonic acid , in its acidic and/or salified form ,wherein at least a portion of the 2-acrylamido-2-methylpropanesulfonic acid is in hydrated crystalline form and has a powder X-ray diffraction pattern including peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, and 46.04° degrees 2-theta, all peak values being +/−0.1°.2. The (co)polymer according to claim 1 , wherein the (co)polymer comprises one or more additional monomers selected from the group consisting of non-ionic monomers claim 1 , cationic monomers claim 1 , zwitterionic monomers claim 1 , anionic monomers distinct from 2-acrylamido-2-methylpropanesulfonic acid being in hydrated crystalline form and having a powder X-ray diffraction pattern including peaks at 10.58° claim 1 , 11.2° claim 1 , 12.65° claim 1 , 13.66° claim 1 , 16.28° claim 1 , 18.45° claim 1 , 20° claim 1 , 20.4° claim 1 , 22.5° claim 1 , 25.5° claim 1 , 25.88° claim 1 , 26.47° claim 1 , 28.52° claim 1 , 30.28° claim 1 , 30.8° claim 1 , 34.09° claim 1 , 38.19° claim 1 , 40.69° claim 1 , 41.82° claim 1 , 43.74° claim 1 , and 46.04° degrees 2-theta claim 1 , all peak values being +/−0.1° claim 1 , and mixtures thereof.3. The (co)polymer according to claim 1 , wherein the (co)polymer is a copolymer of the hydrated crystalline form of 2-acrylamido-2-methylpropanesulfonic acid and at least one non-ionic monomer.4. The (co)polymer according to claim 1 , wherein the (co)polymer is a copolymer of the hydrated crystalline form of 2-acrylamido-2- ...

METHOD FOR RECOVERY OF PHOSPHATE

The present invention provides a method for recovery of phosphate, in the form of magnesium ammonium phosphate (MAP), from a process for treating a biomass material which process comprises a digestion step performed in a digestion tank and includes a pre-treatment step employing a thermal hydrolysis, characterised in that a magnesium source is added to the material in the process flow before said flow enters the digestion tank, and phosphate is recovered as MAP as an integral part of a solid or semi-solid digestate product from the digestion tank. 2. The method according to claim 1 , wherein the pre-treatment of step ii) further comprises a wet-explosion claim 1 , wherein the pressure is reduced from at least 5 bar to 1 bar or less claim 1 , after said thermal hydrolysis.3. The method according to claim 1 , wherein step i) of adding the magnesium ion source is performed prior to claim 1 , or during the thermal hydrolysis of step ii).4. The method according to claim 1 , wherein step i) of adding the magnesium ion source is performed after the thermal hydrolysis claim 1 , or during the wet explosion of step ii).5. The method according to claim 1 , wherein the magnesium ion source is MgO and/or Mg(OH).6. The method according to claim 1 , wherein step v) is present.7. The method according to claim 1 , wherein pH in the digestion tank is in a range of 7.5 to 8.3 claim 1 , more preferably in a range of 7.9 to 8.3.8. The method according to claim 1 , wherein step v) further comprises a purification of the separated MAP.9. The method according to claim 1 , wherein the pH during the pre-treatment in step ii) is kept below 7.0.10. The method according to claim 6 , wherein the extent of the MAP reduction performed in step v) is controlled by measuring the phosphate or phosphorous content in the digestate obtained in step iii).11. The method according to claim 1 , wherein the digestate from step iii) is subjected to a dewatering to obtain the solid or semi-solid digestate ...

Improving sludge dewaterability and energy balance of wastewater treatment

The present invention relates to a process for treating primary sludge in a wastewater treatment plant, comprising the steps of admixing an organic coagulant and/or polymer to wastewater; allowing a primary treatment of the wastewater in the presence of the organic coagulant or polymer; separating solids as a primary sludge from said primary treatment; and dewatering the primary sludge. The present invention further relates to a method of improving primary sludge dewaterability and improving energy balance of a wastewater treatment plant.

Rake-free thickening device including driving area

Disclosed is a rake-free thickening device including driving area. The device includes a feed assembly, a diversion assembly and a clean coal collection assembly. The clean coal collection assembly includes a driving area. The diversion assembly includes a central tank. Slime water passes through the feed assembly and flows with a medicament from an upper part of the central tank to a middle of the central tank, and then diffuses around. Bubbles carry the fine slime up after reacting. The driving zone drives the dispersed bubbles to a defoaming zone located in the middle of the central tank. The slime water in the central tank flows through the central tank after defoaming. With the continuously filling of slime water, the slime water above the central tank overflows the central tank to the clean coal collection assembly within the diversion and settlement area.

METHOD FOR PREPARING ERIDITE ROD-SHAPED PARTICLES FOR WATER TREATMENT BY UTILIZING WASTEWATER

The present invention discloses a method for preparing Erdite rod-shaped particles for water treatment by utilizing iron-containing waste mud in an underground water plant. In the method, aqueous iron mud is subjected to mechanical dehydration to obtain a first aqueous iron mud; sodium sulfide is added to the first aqueous iron mud to obtain a first mixture, wherein the ratio of the weight of the first aqueous iron mud to the volume of sodium sulfide is between 3% and 15%; water of an equal volume is added to the first mixture, and the obtained solution is heated in an airtight manner to 140° C.-270° C.; centrifugal treatment is performed to obtain a supernatant and a solid, and the solid is subjected to vacuum drying at 40° C.-60° C. for 24h to obtain Erdite rod-shaped particles. In the method, aqueous iron mud formed after precipitation of backwash wastewater is directly used, no drying treatment is needed, and silicon and aluminum and other impurities do not need to be removed, thereby saving costs; NaS is directly added to iron mud which is subjected to mechanical dehydration, and adjustment of pH value is not needed, therefore, the preparation method is convenient; and a supernatant can be recycled, thereby lowering preparation cost, and expanding an application range of the method. 1. A method for preparing Erdite rod-shaped particles for water treatment by utilizing iron-containing waste mud in an underground water plant , said method comprising the following steps:A. performing mechanical dehydration on aqueous iron mud, controlling a moisture content of the aqueous iron mud to be between 20% and 50%, to obtain a first aqueous iron mud;B. adding sodium sulfide to the first aqueous iron mud to obtain a first mixture, wherein the ratio of the weight of the first aqueous iron mud to the volume of sodium sulfide is between 3% and 15%;C. adding water of an equal volume to the first mixture, heating the obtained solution in an airtight manner to 140° C.-270° C., ...

METHOD AND DEVICE FOR PURIFYING DOMESTIC OR INDUSTRIAL WATER

A method and a device for the continuous purification of a domestic or industrial water stream. After passing through a biological reactor to obtain a sludge of between 4 and 12 g/l of Dry Solids, the method involves feeding a series of chambers separated by restrictions at a flow rate q, injecting air into a second chamber at a flow rate Q>q, in order to obtain an emulsion, injecting a flocculant into a third chamber, and recovering the degassed emulsion in a drain pan. Flocculated and aerated sludge floats on top, such that the remaining liquid centrate has a Dry Solids content less than 100 mg/l and has a positive redox potential>50 mV and a value greater than 100 mV relative to the redox potential of the sludge at the inlet of the chambers, and is reinjected upstream from or into the biological reactor. 1. A method for continuously purifying a flow of domestic or industrial waters , wherein the flow is subjected to treatment in a biological reactor by injecting an oxidizing gas into said flow and obtaining a first separation between the liquid part , which is discharged , and an organic sludge , which is decanted in the bottom part of the reactor or of an adjacent separator/settler , such that said sludge comprises between 4 and 12 g/l of Dry Matter (DM) , wherein said sludge is used to supply a chamber termed second chamber in continuous flow at a rate q , via a first restriction directly , or through a chamber termed first chamber , said second chamber being a following chamber , by air being injected into said second chamber at a rate Q≥q , to give an emulsion ,a predetermined pressure drop is created in the emulsion by a second restriction of supplying of a subsequent chamber termed third chamber,a flocculant is injected into said third chamber, said emulsion is degassed,the emulsion thus degassed is recovered in a recovery tank, in such a way that the flocculated and aerated sludge of said emulsion then floats in the top part of the tank, such that the ...

INCINERATION BYPRODUCT PROCESSING AND METHODS

Methods and systems for processing incineration byproduct from waste incinerators, ash purification and recovery of materials and metals. High levels of aggregate and metals recovery and ash purification are achieved for residual ash with reduced environmental contaminants. 1. A method of processing incineration byproduct to obtain particles of unburned material , aggregate sand and ash , the process comprising the steps of:(a) receiving incineration byproduct and passing the incineration byproduct through a screen and separating particles having a dimension greater than approximately three inches from the incineration byproduct;(b) transferring the incineration byproduct to a wash plant equipped to hold water and the incineration byproduct;(c) mixing water with the incineration byproduct in the wash plant;(d) separating additional particles from the incineration byproduct in the wash plant, the additional particles having a dimension greater than approximately six mesh;(e) discharging the additional particles from the wash plant;(f) transferring incineration byproduct mixed with water from the wash plant to a thickener and separating ash from the water in the thickener as ash sludge discharged from the thickener, and(g) dewatering the ash sludge discharged from the thickener to produce ash cake.2. The method of further comprising the step of sorting the particles having a dimension greater than approximately three inches between metals and unburns.3. The method of further comprising the step of sorting the metals between ferrous and non-ferrous.4. The method of further comprising the step of separating the additional particles from the incineration byproduct in the wash plant by use of two or more screens located in the wash plant claim 1 , the two or more screens having openings greater in size than approximately six mesh.5. The method of further comprising the step of discharging aggregate sand from the wash plant.6. The method of further comprising the step of ...