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Sewage treatment method

A sewage treatment method and sewage technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor impact resistance of flocs, short storage time of flocs, low COD removal rate, etc. The effect of long storage time and simple preparation process

Inactive Publication Date: 2016-03-30
QINGDAO SEIICHI INTPROP SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a sewage treatment method to solve the problems of slow flocculation speed, short storage time of flocs, poor impact resistance of flocs and low removal rate of COD in the existing method of sewage treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Get 150g of anhydrous aluminum chloride, slowly add 750ml of ultrapure water after crushing, put it into a dissolving tank, start a magnetic stirrer, and make it fully dissolve into an aluminum chloride solution with a mass ratio of 20%; then take 50g of ammonium carbonate, Put it into a dissolving tank, add 250ml of ultrapure water, and stir fully to make it fully dissolve into a 20% ammonium carbonate solution by mass. Then put the prepared aluminum chloride solution and ammonium carbonate solution into a compounding tank at a volume ratio of 1:0.8, and stir vigorously to fully mix the two solutions to obtain polyaluminum chloride for later use. Take 150g of acrylamide, slowly add 750ml of ultrapure water, put it into a dissolving tank, start a magnetic stirrer, and make it fully dissolve into an acrylamide solution with a mass ratio of 20%; take 150g of acrylic acid, slowly add 750ml of ultrapure water, and make It is fully dissolved into an acrylic acid solution wit...

Embodiment 2

[0021] Embodiment 2 Get 150g of anhydrous aluminum chloride, slowly add 750ml of ultrapure water after crushing, put it into a dissolving tank, start a magnetic stirrer, and make it fully dissolve into an aluminum chloride solution with a mass ratio of 20%; then take carbonic acid Add 50g of ammonium into a dissolving tank, add 250ml of ultrapure water, and stir fully to make it fully dissolve into a 20% ammonium carbonate solution by mass. Then put the prepared aluminum chloride solution and ammonium carbonate solution into a compounding tank at a volume ratio of 1:1.5, and stir vigorously to fully mix the two solutions to obtain polyaluminum chloride for later use. Take 150g of acrylamide, slowly add 750ml of ultrapure water, put it into a dissolving tank, start a magnetic stirrer, and make it fully dissolve into an acrylamide solution with a mass ratio of 20%; take 150g of acrylic acid, slowly add 750ml of ultrapure water, and make It is fully dissolved into an acrylic acid...

Embodiment 3

[0024] Get 150g of anhydrous aluminum chloride, slowly add 750ml of ultrapure water after crushing, put it into a dissolving tank, start a magnetic stirrer, and make it fully dissolve into an aluminum chloride solution with a mass ratio of 20%; then take 50g of ammonium carbonate, Put it into a dissolving tank, add 250ml of ultrapure water, and stir fully to make it fully dissolve into a 20% ammonium carbonate solution by mass. Then put the prepared aluminum chloride solution and ammonium carbonate solution into a compounding tank with a volume ratio of 1:1, and stir vigorously to fully mix the two solutions to obtain polyaluminum chloride for later use. Take 150g of acrylamide, slowly add 750ml of ultrapure water, put it into a dissolving tank, start a magnetic stirrer, and make it fully dissolve into an acrylamide solution with a mass ratio of 20%; take 150g of acrylic acid, slowly add 750ml of ultrapure water, and make It is fully dissolved into an acrylic acid solution wit...

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PUM

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Abstract

The invention discloses a sewage treatment method, which comprises the steps of: (i) mixing an aluminum chloride solution with an ammonium carbonate solution evenly to obtain polyaluminum chloride for standby use; (ii) mixing an acrylamide solution with an acrylic acid solution, adding a sodium hydroxide solution dropwise into the mixed solution, adjusting the pH value to neutral, introducing nitrogen, adding an ammonium persulfate solution, shaking the mixture evenly, then adding a sodium bisulfite solution, and carrying out reaction to obtain polyacrylamide for standby use; (iii) taking sewage, adding the polyaluminum chloride into the sewage, conducting stirring, when fine suspended particles appear in the sewage, adding the polyacrylamide, performing stirring, and carrying out standing when flocs appear in the sewage. The sewage treatment method provided by the invention has the characteristics of short flocculation time, long floc preservation time, large floc impact strength, high COD removal rate and good decoloration effect, can be widely used in various sewage treatment, especially in sewage treatment at the papermaking middle stage.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a treatment method for treating various sewage, especially sewage in the middle stage of papermaking. Background technique [0002] With the development of modern industry, a large amount of sewage is discharged, which seriously pollutes the living environment of human beings. Therefore, water pollution is an urgent problem for human beings to solve. Papermaking wastewater is one of the key pollution sources of water pollution. The wastewater in the middle stage of papermaking contains a large amount of impurities such as fine fibers, resins, and pigments. If it is not treated when it is discharged, the water resources will be severely damaged. There are many papermaking wastewater treatment technologies at home and abroad, among which the most widely used is the flocculation-sedimentation method, which uses flocculants to form flocs from fine-grained solids dispersed in the sewage li...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 徐聪
Owner QINGDAO SEIICHI INTPROP SERVICE CO LTD
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