A kind of flocculant for treating food sewage and its preparation method and application

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, and achieve improved flocculation net catchability, less residual amount, The effect of making raw materials cheap

Active Publication Date: 2017-11-28
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. Take liquid water glass with a modulus of 2.8, then dilute the above water glass with water to adjust the content to a silica content of 2wt%, and pass the solution through an 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 temp...

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 for pressure steaming reaction to generate liquid water glass, dilute with water to adjust the content to a silicon dioxide content of 5wt%, and pass the solution through filling Dowex 50 cation-exchange resin exchange columns to obtain a dilute silica sol solution with a sodium oxide content of 0.5 wt% and a pH of ...

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 macroporous strongly acidic cation exchange resin exchange column, to obtain a sodium oxide content of 0.32wt%, pH...

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Abstract

The invention provides a preparation method of a flocculant for treating food sewage; dimethyl diallyl ammonium chloride and acrylamide monomer are dissolved in distilled water at a ratio of 1:1 to 10 to form a concentration of 20 to 40 wt%. Solution; Potassium persulfate and sodium sulfite are respectively configured as initiators, and cerium sulfate is configured as a catalyst; liquid water glass with a modulus of 2.8 to 3.5 is taken, and then the above water glass is diluted with water to adjust the content to a silicon dioxide content of 2 to 10 wt%, and the solution A dilute silica sol solution with a sodium oxide content of less than 1wt% and a pH of less than <4 is obtained by filling an exchange column of a cation exchange resin; reaction polymerization is used to obtain a polysilicic acid / polyacrylamide composite flocculant for food sewage treatment. The flocculant of the present invention is applied to the treatment of food sewage, or to the treatment of drinking water and waste water. Effectively remove floating impurities and water-soluble pigments in food sewage, suitable for industrial production and application.

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 Patents(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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