High-efficiency flocculating agent for waste water treatment

A wastewater treatment and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem that the flocculation mechanism is not yet fully mature, and achieve the effect of excellent thickening and surface activity

Inactive Publication Date: 2014-06-25
SHANGHAI HESHUN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flocculation reaction is a relatively complex physical and chemical process, and its flocculation mechanism is not yet fully mature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of the block copolymers of the present invention is carried out under conditions of thermal initiation, redox initiation or radiation initiation. The preparation method is as follows: add initiator and acrylamide monomer into the autoclave, seal and freeze, vacuumize, and circulate nitrogen for several times, then add another monomer glucosamine, and obtain a copolymer solution after polymerization reaction. After the solution is concentrated, it precipitates in the poor solvent of the polymer, and is vacuum-dried until constant weight to obtain a block copolymer flocculant, and the flocculant is an acrylamide-glucosamine-acrylamide block copolymer with a linear structure, which belongs to the A-B-A type. That is—[A-B-A] n —, wherein A is acrylamide, and B is glucosamine.

Embodiment 2

[0025] The preparation of the block copolymers of the present invention is carried out under conditions of thermal initiation, redox initiation or radiation initiation. The preparation method is as follows: add initiator and acrylamide monomer to the autoclave, seal and freeze, vacuumize and circulate nitrogen for several times, add monomer glucosamine and chitosan, obtain copolymer solution after polymerization reaction, and After the solution in the body is concentrated, it precipitates in a poor solvent of the polymer, and is vacuum-dried until constant weight to obtain a block copolymer flocculant, and the flocculant is a linear structure of acrylamide-glucosamine-chitosan-glucosamine-acrylamide embedded Segment copolymers of the type A-B-C-B-A, ie—[A-B-C-B-A] n -, wherein A is acrylamide, B is glucosamine, and C is chitosan.

Embodiment 3

[0027] The preparation of the block copolymers of the present invention is carried out under conditions of thermal initiation, redox initiation or radiation initiation. The preparation method is as follows: add initiator and dimethylacrylamide monomer into the autoclave, seal and freeze, vacuumize and circulate nitrogen for several times, add another monomer carboxymethylglucose, and obtain copolymerization after polymerization After the solution in the kettle is concentrated, it precipitates in the poor solvent of the polymer, and vacuum-dries until constant weight to obtain a block copolymer flocculant, and the flocculant is a linear structure of dimethylacrylamide-glucosamine-dimethyl Acrylamide block copolymer, belonging to A-B-A type, that is—[A-B-A] n —, wherein A is dimethylacrylamide, and B is carboxymethylglucose.

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PUM

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Abstract

The invention discloses a high-efficiency flocculating agent for waste water treatment. The flocculating agent is a segmented-copolymer flocculating agent; and a segmented copolymer is one of the segmented copolymers with a linear structure, a star-shaped structure or high branching degree. The segmented-copolymer flocculating agent comprises at least two types of monomers which are acrylamide, acrylamide homologue, chitosan, glucose, aminoglucose, alkyl glucose, acyl glucose, glucuronic acid or carboxymethyl glucose. The high-efficiency flocculating agent disclosed by the invention has the beneficial effects that the whole segmented copolymer has higher molecular weight and more functional groups, so that various impurities in water are easily caught and the water quality is improved; the high-efficiency flocculating agent has excellent properties such as no toxicity, degradability, no pollution to environment, bacterium resistance, gel property, foamability, thickening property and surface activity; in addition, by forming of the segmented copolymer, the flocculation of all monomers is maximized, and the removal rate of suspended matters in sewage is more than 90%.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a high-efficiency wastewater treatment flocculant. Background technique [0002] With the continuous and rapid development of my country's economy and the continuous expansion of urban scale, the discharge of industrial wastewater and urban domestic sewage is increasing year by year. The problem of sewage treatment and purification has become more and more important. If it is not handled well, it will become a constraint for our country. Major issues of economic development and people's drinking water safety. With the strengthening of environmental protection policies and the enhancement of people's awareness of environmental protection, industrial wastewater and urban domestic sewage must be strictly treated before discharge to remove suspended solids, impurities, particles, etc. in the water, and can only be discharged after reaching the relevant national environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 孔根妹林亚明李珍英胡颖华
Owner SHANGHAI HESHUN CHEM TECH
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