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Food sewage treatment flocculant, preparation method and applications thereof

A food sewage and flocculant technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low price, difficult biodegradation and high treatment cost of inorganic flocculants, so as to improve the catch capacity of flocculation nets, less residual amount, The effect of making raw materials cheap

Active Publication Date: 2016-01-13
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic flocculants have the disadvantages of low price and large dosage
Although the organic flocculant has strong adsorption and bridging ability and good product stability, the processing cost is high, and some are difficult to biodegrade, and some have certain toxic and side effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve dimethyl diallyl ammonium chloride and acrylamide monomer in distilled water at a ratio of 1:1 to form a monomer solution with a concentration of 20wt%. After ultrasonic shock treatment for 10 minutes, transfer it to a three-necked flask and pass nitrogen gas for 10 minutes. , to exclude oxygen from the system. Weigh respectively 0.06wt% potassium persulfate and 0.01wt% sodium sulfite as initiator, and 0.01wt% cerium sulfate as catalyst, put the above three raw materials into deionized water, mix and stir to fully dissolve them. Get the liquid water glass of modulus 2.8, then dilute the above water glass with water to adjust the content to 2wt% of silicon dioxide content, the solution is passed through the exchange column filled with American Amberlite IR-120 cation exchange resin to obtain a sodium oxide content of 0.8wt%, A dilute solution of silica sol at pH 3.6. Add the prepared initiator and catalyst mixed solution into the monomer solution, control the t...

Embodiment 2

[0028]Dissolve dimethyl diallyl ammonium chloride and acrylamide monomer in distilled water at a ratio of 1:5 to form a 30wt% concentration monomer solution. After ultrasonic shock treatment for 10 minutes, transfer it to a three-necked flask and let nitrogen gas flow for 10 minutes. , to exclude oxygen from the system. Weigh respectively 0.03wt% potassium persulfate and 0.03wt% sodium sulfite as initiator, and 0.03wt% cerium sulfate as catalyst, put the above three materials into deionized water, mix and stir to fully dissolve them. Take the solid water glass with a modulus of 3.0 and put it into a high-pressure steamer to feed water vapor, then keep 3 atmospheres to carry out the pressure steaming reaction to generate liquid water glass, dilute with water to adjust the content to 5wt% of the silicon dioxide content, and pass the solution through filling Dowex50 The exchange column of the cation exchange resin is used to obtain a dilute silica sol solution with a sodium oxide...

Embodiment 3

[0031] Dissolve dimethyl diallyl ammonium chloride and acrylamide monomer in distilled water at a ratio of 1:10 to form a monomer solution with a concentration of 40wt%. After ultrasonic shock treatment for 10 minutes, transfer it to a three-necked flask and inject nitrogen gas for 10 minutes. , to exclude oxygen from the system. Weigh respectively 0.01wt% potassium persulfate and 0.06wt% sodium sulfite as initiator, and 0.06wt% cerium sulfate as catalyst, put the above three raw materials into deionized water, mix and stir to fully dissolve them. Take the solid water glass with a modulus of 3.5 and put it into a high-pressure steamer to feed water vapor, and then keep 6 atmospheres for pressure steaming reaction to generate liquid water glass, dilute with water to adjust the content to 10wt% of the silicon dioxide content, and pass the solution through the NKC -9 exchange columns of macroporous strongly acidic cation exchange resin to obtain a dilute silica sol solution with ...

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Abstract

The present invention provides a food sewage treatment flocculant preparation method, which comprises: dissolving dimethyl diallyl ammonium chloride and an acrylamide monomer in distilled water according to a ratio of 1:1-10 to form a solution with a concentration of 20-40 wt%; respectively preparing potassium persulfate and sodium sulfite as initiators, and preparing cerium sulfate as a catalyst; taking liquid water glass with a modulus of 2.8-3.5, diluting the water glass with water, adjusting the content to achieve a silica content of 2-10 wt%, loading the solution onto an exchange column filled with a cation exchange resin to obtain a silica sol dilute solution with a sodium oxide content of less than 1 wt% and the pH value of less than 1-4; and carrying out reaction polymerization to obtain the food sewage treatment polysilicic acid / polyacrylamide composite flocculant. According to the present invention, the flocculant is used for food sewage treatment or drinking water and wastewater treatment, can effectively remove floating impurities and water-soluble pigments in food sewage, and is suitable for industrial production and applications.

Description

technical field [0001] The invention relates to a synthesis method of a flocculant, in particular to a method for flocculation removal of suspended impurities in food sewage and flocculation clarification of water-soluble pigments. The invention relates to a flocculant for treating food sewage, a preparation method and application thereof. Background technique [0002] Nowadays, with the continuous improvement of people's living standards, the demand for various foods is also increasing. Therefore, the amount of sewage discharged by food enterprises has also increased. If the sewage is not treated in time, it will cause serious environmental pollution. Ion exchange resin and membrane separation technology for sewage treatment have high requirements for influent water quality, and it is difficult to reduce the cost of high-concentration sewage treatment. As an important method in the front stage of wastewater treatment, flocculation has been widely used in the water treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C08F220/56C08F226/02
Inventor 郑春明程相芝孙晓红鲍守民
Owner TIANJIN POLYTECHNIC UNIV
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