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MBR membrane cleaning method for sewage treatment

A technology of sewage treatment and membrane cleaning, which is applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, special treatment targets, etc. It can solve problems such as MBR membrane damage, MBR membrane erosion, and reduce the service life of MBR membranes. Improve the cleaning effect, facilitate maintenance and maintenance, and prolong the service life

Pending Publication Date: 2022-01-14
广东蓝月环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the MBR membrane is used to filter domestic sewage, the MBR membrane is usually cleaned with a strong oxidizing agent, which can achieve an efficient MBR membrane cleaning effect. The membrane is corroded, which will cause damage to the MBR membrane, thereby reducing the service life of the MBR membrane

Method used

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  • MBR membrane cleaning method for sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0053] Preparation of A medicament: Weigh 50Kg of sodium hypochlorite, 5Kg of potassium hydrogen persulfate compound salt, 3Kg of sodium lauryl sulfate and 1Kg of polyacrylamide, add them to 500Kg of deionized water, and mix them evenly to obtain A medicament ;

preparation example 2

[0055] A preparation of A medicament: 100Kg sodium hypochlorite, 7.5Kg potassium hydrogen persulfate complex salt, 4Kg sodium lauryl sulfate, 5Kg polyacrylamide and 1000Kg deionized water, mixed uniformly to obtain A medicament;

preparation example 3

[0057] Preparation of a medicament A: Weigh 200Kg of sodium hypochlorite, 10Kg of potassium monopersulfate compound salt, 5Kg of sodium lauryl sulfate, 10Kg of polyacrylamide and 2000Kg of deionized water, mix them uniformly, and obtain the A medicament;

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Abstract

The invention relates to the technical field of sewage treatment, and concretely relates to an MBR membrane cleaning method for sewage treatment. The MBR membrane cleaning method comprises daily cleaning operation and maintenance cleaning operation. The daily cleaning operation comprises backwashing treatment and chemical washing treatment, and when the negative pressure value of the MBR membrane is -0.035 to -0.045 MPa, backwashing treatment is carried out; and when the negative pressure value of the MBR membrane is -0.046 MPa to -0.060 MPa, chemical washing treatment is carried out, chemical washing liquid A is adopted for cleaning an MBR membrane in the chemical washing treatment, and the chemical washing liquid A is prepared by mixing a chemical agent A and water, whether backwashing treatment or chemical washing treatment is adopted is judged according to the negative pressure value of the MBR membrane, the MBR membrane is immersed in the chemical washing liquid for a long time, and maintenance is carried out through maintenance and cleaning operation to maintain the MBR membrane, so the service life of the MBR membrane is prolonged.

Description

technical field [0001] This application relates to the technical field of sewage treatment, more specifically, it relates to a method for cleaning MBR membranes used in sewage treatment. Background technique [0002] MBR, also known as membrane bioreactor, is a kind of sewage treatment, and it filters the water containing sludge in the sewage treatment biochemical reaction tank, which has an efficient mud-water separation effect. There are many types of MBR membranes, classified according to the separation mechanism, including reaction membranes, ion exchange membranes, permeable membranes, etc. Among them, during the treatment process of MBR, on the one hand, the microorganisms in the reaction tank are intercepted, so that the concentration of activated sludge in the tank is greatly increased. Increase, so that the biochemical reaction of degrading sewage can be carried out more quickly and thoroughly; on the other hand, MBR has the effect of high filtration precision, maki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02C02F3/12
CPCB01D65/02C02F3/1268B01D2321/04B01D2321/16C02F2303/14Y02W10/10
Inventor 王艳银尹晓儿吴亚飞黄晶池董长飞容海
Owner 广东蓝月环境工程有限公司
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