Method for inhibiting growth of cyanobacteria

The invention discloses a method for inhibiting the growth of cyanobacteria, comprising the following steps of: 1, acidification on a water body to be processed: charging CO2 gas into an inoculated alga solution, and acidifying the alga solution by utilizing the characteristic that CO2 and water react to generate H<+> so that the pH value of the alga solution can reach a preset acidity; 2, continuous CO2 charging: regularly charging CO2 into the alga solution in the daily light period so that the pH value of the alga solution can reach the preset acidity after the acidification process starts; and 3, charging pause: stopping CO2 charging when the alga solution is changed to be almost clear from aqua before CO2 charging and the value of chlorophyll a is close to 0 or the inhibition effect does not change remarkably with the acidifying treatment time, wherein the step 2 further comprises a step of monitoring the pH value of the alga solution and the chlorophyll a: measuring the pH value of ...

Specific bacterial strain for fusing two fungi and a protoplast and constructing method thereof

The invention refers to a specific bacterium plant fused by the protoplast of two epiphytes and one bacterium and its structuring method which fuses the protoplast of true nucleus cell of white rotten epiphyte (phanerochaete chrysosporium), original nucleus cell (Pseudomonas) of aboriginal bacterium YZ1 and real nucleus cell of vintage yeast (Saccharomyces cerevisiae), and by three relative genes' reformation and conformity in a same cell, structures the gene-engineering specific bacterium. The technique consists of parent and three-parent transboundary fusion.

Specific bacteria preparation and method for treating chemical waste water or conventional organic waste water

Low-crystal-point plate-grade ABS (acrylonitrile-butadiene-styrene) material and preparation method thereof

The invention relates to the technical field of polymer composite materials, and discloses a method for preparing a low-crystal-point plate-grade ABS material by a bulk method.The method specifically comprises the following steps that S1, 8-9 parts by mass of low cis-polybutadiene rubber, 13-15 parts by mass of ethylbenzene, 50-60 parts by mass of styrene and 15-25 parts by mass of acrylonitrile are dissolved, filtered through a filter screen and preheated to form a raw rubber solution; s2, respectively conveying the raw glue solution, an initiator, a chain transfer agent and an auxiliary agent to four stages of reaction kettles for continuous bulk polymerization, wherein each stage of reaction kettle is provided with three temperature zones; s3, feeding the polymerized material into a devolatilization device, and carrying out first-stage devolatilization and second-stage devolatilization to obtain a devolatilization material; and S4, adding a fluorine-containing polymer processing aid ...

Catalytic oxidation system and use thereof in tazobactam synthesis

The invention relates to a catalytic oxidation system and the application thereof in the synthesis of Tazobactam. The catalytic oxidation system formed a tungstate catalyst or a molybdate catalyst and a hydrogen peroxide oxidant is applied to the synthesis of Tazobactam to prepare a penicillanic acid sulfoxide intermediate I by catalytizing and oxidizing penicillanic acid. The reaction is characterized by high yield, good reaction selectivity, recyclable catalyst, and the like, required by green chemistry, wherein, R1 represents a carboxyl blocking group; R2 and R3 can be groups of the same pair or groups of different pair, such as H, halogen molecules, NH2, amide groups, and the like.

6, 6-dibromo penicillanic acid preparation method

The invention discloses a 6, 6-dibromo penicillanic acid preparation method which is as follows: at the temperature of-20 to 0 DEG C, sodium nitrite is slowly added into a hydrobromic acid solution dissolved with bromide to produce and separate a black active solution containing nitrosyl bromide, bromide and sodium bromide; then the solution is dripped into a 6-APA hydrobromic acid solution of the temperature of-25 to 5 DEG C; after the completion of reaction, reaction liquid is filtered, and the product 6, 6-dibromo penicillanic acid is obtained by washing and vacuum drying of the filter cake. The method completely does not use an organic solvent, is simple in post-processing, improves the utilization rate of the bromide and the hydrobromic acid, ensures the safety of production and reduces the cost, and the product yield of 96.5% or higher.

Biological adsorption agent, producing method and use of the same

The invention discloses a biological adsorbent and making method and application in the environmental harness domain, which is characterized by the following: adopting waste bacteria in the manufacturing course based on solid ferment alkaline pectase and megasse to prepare biological adsorbent of heavy metal; fitting for disposing waste water with pH value at 2-8 and heavy metal content at 10-1000mg/L; saving cost effectively with adsorbing content to 20-180mg/g; removing metal ion in the waste water effectively.

Catalytic oxidation system and use thereof in tazobactam synthesis

The invention relates to a catalytic oxidation system and the application thereof in the synthesis of Tazobactam. The catalytic oxidation system formed a tungstate catalyst or a molybdate catalyst and a hydrogen peroxide oxidant is applied to the synthesis of Tazobactam to prepare a penicillanic acid sulfoxide intermediate I by catalytizing and oxidizing penicillanic acid. The reaction is characterized by high yield, good reaction selectivity, recyclable catalyst, and the like, required by green chemistry, wherein, R1 represents a carboxyl blocking group; R2 and R3 can be groups of the same pair or groups of different pair, such as H, halogen molecules, NH2, amide groups, and the like.

Preparation method of penicillanic acid sulphoxide diphenyl methyl ester

The invention discloses a preparation method of a penicillanic acid sulphoxide diphenyl methyl ester and belongs to the technical field of medicines. The preparation method comprises: by taking an alkyl halide as the reaction solvent, a lower fatty alcohol as the catalyst and hydrogen generated by reacting an active metal powder with the aqueous solution of ammonium acetate as the reducing agent, and reducing 6-bromopenicillanic acid sulphoxide diphenyl methyl ester, and then carrying out filtration, decompression concentration and high-temperature impurity removal of cyclohexane to obtain the penicillanic acid sulphoxide diphenyl methyl ester. The preparation method is characterized in that the alkyl halide is taken in stead of expensive tetrahydrofuran which is prone to form explosive oxides; in addition, the method has the advantages of simple after-treatment, low cost, low danger, and high reaction yield and content, and the like.

Washing method and device matched with continuous automatic material pushing type centrifugal dewaterer

The invention provides a washing method and device matched with a continuous automatic material pushing type centrifugal dewaterer. A newly designed short pipe slit type spray head is utilized to replace a multi-hole type spray head of the prior art, and therefore washing water forms laminated water flow under pressure through slits in the short pipe spray head; the formed laminated water flow is utilized to wash materials in the continuous automatic material pushing dewaterer. The short pipe slit type spray head is a section of a short pipe with a thick wall, a section of the slits are formed in the short pipe in the axial direction, the washing water can form the stable and tidy laminated water flow under pressure when passing through the slits, the washing water inlet end of the short pipe slit type spray head is installed on a end cover door of the continuous automatic material pushing dewaterer and communicated with a washing water supplying pipe on the outer side of the centrifugal ...

Agglomeration method of polybutadiene latex used for acrylonitrile butadiene styrene (ABS) resin

An agglomeration method of polybutadiene latex used for acrylonitrile butadiene styrene (ABS) resin is in particular as follows: a static mixer replaces a kettle type agglomeration device in the prior art, intermittent operation is changed into continuous operation to achieve the continuous operation at full liquid, two liquids of the small size polybutadiene latex of about 100 nm and an agglomerating agent are continuously injected into the online static mixer for mixing agglomeration. Agglomerated latex enters into a latex tank provided with a slow rotation spiral stirrer for aging for 10 hours, and after aging, the particle diameter of most of the latex is around 300 nm. The aged latex is used in the graft reaction. Through use of static mixer agglomerating method, completely closed continuous full level operation can be achieved, uniform product quality can be ensured, the oxidation of air to the material can be avoided, the labor intensity can be reduced, and the automation level and ...