Method for improving efficiency of anaerobic baffled reactor and pulse-type anaerobic baffled reactor

The invention relates to a method for improving the efficiency of an anaerobic baffled reactor and a pulse-type anaerobic baffled reactor. Effluent treated by the anaerobic baffled reactor enters a water collecting tank and then partially enters a next processing unit, part of waste water enters the anaerobic baffled reactor again through an inlet of the anaerobic baffled reactor, and the flow ofwaste water which reflows to the anaerobic baffled reactor from the water collecting tank is 30%-100% of the flow of the waste water entering the anaerobic baffled reactor. The pulse-type anaerobic baffled reactor comprises the anaerobic baffled reactor, the water collecting tank and a water pump. Through the intermittent operation of the reflux water pump, impulse is endowed onto the water flow in the anaerobic baffled reactor to form impact on anaerobes at the bottom of the anaerobic baffled reactor, or the linear speed of the water flow in the anaerobic baffled reactor is improved when thewaste ...

Method for recycling biological sludge to treat suspended matter organic waste water

The invention discloses a method for treating suspended substance organic wastewater by recycling biological sludge, which comprises the following: step one, physical pretreatment is performed, wherein chemical mechanical pulp wastewater passes through a group of parallel metal grilles and then a nylon mesh screen, and finally enters a sedimentation tank; step two, hydrolytic acidification is performed, wherein the water after the treatment of the step one enters a hydrolytic pool provided with combined filler; step three, ABR and continuous SBR biological treatment is performed, wherein the wastewater after the treatment of the step two enters an ABR baffle plate anaerobic reactor, the wastewater performs baffling motions up and down along a baffle plate and then enters a continuous SBR aerobic reactor, and simultaneously the biological sludge generated in the continuous SBR aerobic reactor is conveyed to a wastewater inlet of the sedimentation tank in an intermittent or continuous mode ...

Preparation method of sugary gel adsorbing material sensitive to pH value

The invention discloses a preparation method of a sugary gel adsorbing material sensitive to a pH value. The method comprises the following steps: dissolving carbohydrate compounds into an organic solvent, adding a catalytic amount of catalyst and glycidyl methacrylate, and reacting to obtain first reaction liquid; adding acrylic acid, acrylamide and a cross-linking agent to the first reaction liquid after the first reaction liquid is cooled, and adding water to completely dissolve acrylic acid, acrylamide and the cross-linking agent, so as to obtain second reaction liquid; heating the second reaction liquid, adding an initiator, and carrying out reaction under stirring in a thermostat water bath; taking out gel after reaction is ended; firstly cleaning the gel by using deionized water, cutting the gel into small pieces, soaking the gel by using deionized water and then drying the product in a freezer dryer, so as to obtain the sugary gel adsorbing material sensitive to pH. The method disclosed ...

Closed condensation circulation bleaching reactor and efficient bleaching method

The invention discloses a closed condensation circulation bleaching reactor and an efficient bleaching method. The bleaching reactor comprises a reaction kettle body and a reaction kettle cover which can be connected with the reaction kettle body in a sealing manner. A slurry tray is placed in the reaction kettle body and comprises a tray body, and a steam channel is formed in the middle of the tray body; a condenser pipe is installed in the middle of the reaction kettle cover, a lower end outlet of the condenser pipe is communicated with the inside of the reaction kettle body, and the inner diameter of the lower end outlet of the condenser pipe is larger than the outer diameter of the steam channel. After the reaction kettle cover is mounted, the steam channel is covered by the outlet at the lower end of the condensation pipe so as to ensure that all solvent steam generated at the bottom of the kettle enters the condensation pipe. When the bleaching reactor is used for bleaching, slurry ...

Discharge-reducing method for biologically treating chemical-mechanical pulping waste water

The invention discloses a discharge-reducing method for biologically treating chemical-mechanical pulping waste water. The method comprises the following steps of: performing solid discharge reduction and utilization, 3S-AR anaerobic and aerobic biological treatment and chemical oxidation coagulation treatment on papermaking waste water to be treated to obtain supernate which meets the discharge requirement specified by GB3544-2008; allowing the supernate which is subjected to the solid discharge reduction treatment to enter an electrochemical reactor and undergo an electrochemical reaction with filler machining metal residues in the reactor for 0.5 to 4 hours so as to perform toxicity reduction and biodegradability improving treatment on filtrate, wherein the pH of the reaction condition is controlled to be between 6.5 and 7.5 and the temperature is between 20 and 50 DEG C; and performing 3S-AR anaerobic and aerobic biological treatment, wherein the filler machining metal residues in the ...

Water purifying agent for advanced treatment of pulping, papermaking, printing and dyeing wastewater as well as preparation method of water purifying agent

The invention discloses a water purifying agent for advanced treatment of pulping, papermaking, printing and dyeing wastewater as well as a preparation method of the water purifying agent. According to the preparation method, the water purifying agent is prepared through a synthetic reaction of iron salt, diatomite, macromolecular polymers and appropriate conditioners. The water purifying agent is mainly characterized in that the content of iron oxide by weight is 8-14%, the solid content is larger than or equal to 30%, and the pH is in a range of 2-3. The preparation method has the characteristics that the operation is convenient, the production energy consumption is low, the emission of three wastes in the process is avoided and the like. The water purifying agent has the characteristics of small dosage, good COD (chemical oxygen demand) reducing and decolorizing effects and the like.

Three-stage three-cycle anaerobic reactor

The invention discloses a three-stage three-cycle anaerobic reactor. The reactor consists of three independent units connected in series; each reaction unit is provided with a water inlet distributor at the bottom, a three-phase separator at the top and a reaction main body in the middle; anaerobic granular sludge is filled in the reaction unit; the top and the bottom of the reactor are externally connected with an outer circulating pump through a reflux pipe, and the reflux pipe is positioned on the lower part of the three-phase separator; and the water outlet pipe of the first-stage independent reaction unit is connected with and higher than the water inlet pipe of the second-stage independent reaction unit, and the water outlet pipe of the second-stage independent reaction unit is connected with and higher than the water inlet pipe of the third-stage independent reaction unit. The three-stage three-cycle anaerobic reactor does not need to adjust the pH of the inlet water, can improve ...

High-whiteness bleaching method for high-yield bamboo wood pulp

The invention discloses a high-whiteness bleaching method for high-yield bamboo wood pulp. The high-whiteness bleaching method comprises the following steps: firstly, using an extruder to carry out enhanced mechanical treatment on pretreated bamboo sheets; using a transition metal ion remover and the like to carrying out chemical impregnating treatment on extruded cizu materials; then, carrying out secondary spiral extrusion before pulping, straightening and screening; secondarily, using a peroxide activating agent and peroxide to carry out the activating treatment of 20 percent by weight of bamboo pulp at a treatment temperature of 60-90 DEG C for 30-60 minutes; thirdly, using a chlorine-free bleaching medicine H2O2 to carry out high-concentration rested bleaching of 10-30 percent by weight of bamboo pulp at a treatment temperature of 60-90 DEG C for 60-180 minutes; and using a decoloring agent of thiourea dioxide to decolour the bamboo pulp, remove a ground color, adjust a color phase ...

High-whiteness bleaching method for high-yield bamboo wood pulp

The invention discloses a high-whiteness bleaching method for high-yield bamboo wood pulp. The high-whiteness bleaching method comprises the following steps: firstly, using an extruder to carry out enhanced mechanical treatment on pretreated bamboo sheets; using a transition metal ion remover and the like to carrying out chemical impregnating treatment on extruded cizu materials; then, carrying out secondary spiral extrusion before pulping, straightening and screening; secondarily, using a peroxide activating agent and peroxide to carry out the activating treatment of 20 percent by weight of bamboo pulp at a treatment temperature of 60-90 DEG C for 30-60 minutes; thirdly, using a chlorine-free bleaching medicine H2O2 to carry out high-concentration rested bleaching of 10-30 percent by weight of bamboo pulp at a treatment temperature of 60-90 DEG C for 60-180 minutes; and using a decoloring agent of thiourea dioxide to decolour the bamboo pulp, remove a ground color, adjust a color phase ...

Multi-phase-effect waste water deep treatment reactor

A multi-phase-effect waste water deep treatment reactor comprises a pre-positioned reactor and a main reactor, the pre-positioned reactor comprises an inlet and an outlet, at least two static mixers are connected between the inlet and the outlet through a connection pipeline, a pH measurement device is arranged on the pipeline between the static mixers, upstream pipelines of the static mixers are provided with filling ports respectively, the main reactor is a hollow reaction tower, the bottom of the tower is provided with a cyclone inlet water distributor, the upstream portion of the cyclone inlet water distributor is provided with a filling port, at least two catalyst layers, a set of baffle plates, an aerator and spraying defoaming devices are arranged inside the tower sequentially from bottom to top, a high-frequency catalyzing system is arranged between the catalyst layers, a water outlet device is arranged at the top of the tower, and the outlet of the pre-positioned reactor is connected ...

Method for preparing pharmaceutical-grade microcrystalline cellulose from cotton linter

The invention discloses a method for preparing pharmaceutical-grade microcrystalline cellulose from cotton linter. The cotton linter is cooked, degreased, bleached, purified, hydrolyzed, filtered, washed, dried and pulverized to obtain the pharmaceutical-grade microcrystalline cellulose, wherein, in the procedure of cooking and degreasing, pulping is performed by the cotton linter ethanol method; and a cotton linter ethanol pulp is prepared according to the volume ratio as 1:4-10 of the absolutely dry mass of the cotton linter to ethanol with 55% of mass fraction, and then the pulp is cooked at the temperature of 190-195 DEG C for heat preservation for 30-90 minutes. In the procedure of bleaching and purifying, an EAPP process is adopted, wherein an E section is the alkali treatment section by adopting NaOH; an A section is the acid treatment section by adopting sulfuric acid; and a P section is the H2O2 bleaching section. For the microcrystalline cellulose prepared by the method, the ash ...

Composite purifying agent used for chemical-mechanical pulp advanced waste water treatment and preparation method thereof

The invention discloses a composite purifying agent used for chemical-mechanical pulp advanced waste water treatment and a preparation method thereof. The following raw materials are used by parts by weight: 15-60 parts of ferrous sulphate solution with effective content more than or equal to 70wt%, 5-50 parts of 4-5wt% of steel rolling mill pickling waste water, 1-5 parts of alkalizer, 0.15-7 parts of oxidizer, 0-0.05 and more than 0 part of chitosan macromolecule quaternary ammonium salt and 10-40 parts of water. The preparation method thereof includes that synthetic reaction is carried out on ferrous sulphate, pickling waste water, macromolecule quaternary ammonium salt and oxidizer, thus obtaining the finished product composite purifying agent. The product thereof has the main characteristics that the weight content of ferric oxide is more than or equal to 4-7%, the weight content of aluminium oxide is more than or equal to 1-5% and the weight content of macromolecule quaternary ammonium ...

Silicon decreasing method for non-lignine raw material soda pulping process black liquor

The invention discloses a method for reducing silicon in black liquor from alkaline pulping with non-wood fiber raw material. In an alkaline pulping process, a reaction is carried out at a temperature of between 140 to 160 DEG C for 35 to 60 minutes according to the principles of a mass ratio of non-wood fiber to water of 1:3.5-5, a mass percentage of NaOH of 12 to 18 percent; a pressure of O2 of 8kg/cm; and a dosage of metal alkaline earth oxides of 5 to 40 kilograms per ton of absolutely dry non-wood fiber, wherein the grain diameter of the powder alkaline earth oxides is 100 to 200 meshes, and the powder alkaline earth oxides are CaO and MgO. In a pulp cooking process, a silicon-containing filling produced by adding the metal alkaline earth powder can improve the printing properties of paper products such as whiteness, opaqueness, smoothness and absorbency and improve the combustion performance of cigarette paper. The method is simple in operation and can be synchronously carried out ...

Discharge-reducing method for biologically treating chemical-mechanical pulping waste water

The invention discloses a discharge-reducing method for biologically treating chemical-mechanical pulping waste water. The method comprises the following steps of: performing solid discharge reduction and utilization, 3S-AR anaerobic and aerobic biological treatment and chemical oxidation coagulation treatment on papermaking waste water to be treated to obtain supernate which meets the discharge requirement specified by GB3544-2008; allowing the supernate which is subjected to the solid discharge reduction treatment to enter an electrochemical reactor and undergo an electrochemical reaction with filler machining metal residues in the reactor for 0.5 to 4 hours so as to perform toxicity reduction and biodegradability improving treatment on filtrate, wherein the pH of the reaction condition is controlled to be between 6.5 and 7.5 and the temperature is between 20 and 50 DEG C; and performing 3S-AR anaerobic and aerobic biological treatment, wherein the filler machining metal residues in the ...

COD (Chemical Oxygen Demand) reducer for advanced treatment of chemi-mechanical pulping wastewater and preparation thereof

The invention discloses a COD (Chemical Oxygen Demand) reducer for advanced treatment of chemi-mechanical pulping wastewater and preparation thereof. The COD reducer consists of 5 parts of organic high molecular polymer emulsion, 200-400 parts of high charge positive ion coagulant, 1-2 parts of potassium permanganate and 2-4 parts of modified diatomite, wherein acrylamide, styrene sulfonate, lignosulphonate and the like are subjected to copolymerization so as to obtain the organic high molecular polymer emulsion, and the high charge positive ion coagulant consists of 5-10 parts of aluminum salt, 90-95 parts of ferric salt, 1 part of ferrous and 1 part of a quaternary amineorganic polymer flocculant. By using the agent prepare by the method for subsequent advanced treatment on chemi-mechanical pulping wastewater through biochemical treatment with the COD of 300-500mg/L and the chroma of 150-300 times, the effluent of the chemi-mechanical pulping wastewater can reach the national standard ...

Method for improving utilization ratio of chemi-mechanical pulp bleaching filtrate

The invention relates to a method for improving the utilization ratio of a chemi-mechanical pulp bleaching filtrate. The method comprises the following steps of: preparing a chemi-mechanical pulp by processes of log barking, chemically dipping and pulping, screening and concentrating, bleaching, washing and concentrating, and pulp storing; directly recycling a leaching filtrate extracted from a pulp, which is discharged from the bleaching process and is concentrated from 10 to 30 weight percent to 20 to 45 weight percent, to the leaching process; uniformly mixing the leaching filtrate, leaching chemical medicaments and the pulp in a brown pulp mixer to obtain a mixture; and bleaching the mixture in a leaching reactor. After the leaching, a leaching filtrate extraction device is arranged and recycles the leaching filtrate in place of clear water or white water to save the leaching chemical medicaments and reduce the clear water consumption of factories. The method for improving the utilization ...

Dynamic aeration process for treating sewage with high efficiency and low energy consumption

A dynamic aeration process for treating life sewage or industrial sewage with BDO/CDO greater than or equal to 0.2 and no biotoxin by activated sludge method features that on the basis of the variation in characteristics parameters is water treating procedure, the aeration procedure is real-time controlled to keep the dynamic balance between decomposing speed of organic matrix and oxygen supplying speed of dissolved oxygen in biochemical pool, saving electric consumption and effectively cleaning the sewage.

Method for improving efficiency of anaerobic baffled reactor and pulse-type anaerobic baffled reactor