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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: 2013-06-19
HEBEI UNIVERSITY
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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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  • Sewage treatment method

Examples

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Embodiment 1

[0018] Take 150 g of anhydrous aluminum chloride, slowly add 750 ml of ultrapure water after pulverization, 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 ammonium carbonate 50g, put it into a dissolving tank, add 250 ml of ultrapure water, and stir fully to make it fully dissolve into a 20% ammonium carbonate solution with a mass ratio. 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 , so that it is fully dissolved into an acrylic a...

Embodiment 2

[0021] Take 150 g of anhydrous aluminum chloride, slowly add 750 ml of ultrapure water after pulverization, 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 ammonium carbonate 50g, 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 ratio. 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 s...

Embodiment 3

[0024] Take 150 g of anhydrous aluminum chloride, slowly add 750 ml of ultrapure water after pulverization, 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 ammonium carbonate 50g, 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 ratio. 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 s...

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Abstract

The invention discloses a sewage treatment method comprising the following steps of: (i) mixing an aluminum oxide solution with an ammonium carbonate solution; agitating uniformly to obtain poly-aluminum chloride for future use; (ii) mixing an acrylic amide solution with an acrylic acid solution; dripping a sodium hydroxide solution into the mixed solution to adjust the pH (Potential of Hydrogen)to be neutral; introducing nitrogen gas and adding an ammonium persulfate solution; shaking uniformly and adding a sodium hydrogensulfite solution to react to obtain polyacrylamide for future use; and (iii) taking sewage and adding the poly-aluminum chloride into the sewage; agitating and adding the polyacrylamide after fine suspension particles appear in the sewage; and agitating and standing after a flocculating constituent appears in the sewage. The sewage treatment method disclosed by the invention has the properties of short flocculating time, long storage time of the flocculating constituent, great impact strength of the flocculating constituent, high COD (Chemical Oxygen Demand) removing rate and good de-coloring effect, and can be widely applied to the treatment of various types of the sewage, particularly papermaking middle-section sewage treatment.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56
Inventor 苗欣宇刘志强李庆刘铁
Owner HEBEI UNIVERSITY
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