High pollution resistance membrane bioreactor and sewage treatment method

Abstract

The invention discloses a high pollution resistance membrane bioreactor and a sewage treatment method. A membrane assembly is arranged in the membrane bioreactor. A partition plate is arranged in the membrane bioreactor and close to the water outlet end. A sludge and water inlet and outlet is formed in the position, close to the lower middle portion of the membrane bioreactor, of the partition plate. The partition plate divides the membrane bioreactor into a biochemical reaction area and a sludge-water separation area. Sewage biochemical treatment is carried out in the biochemical reaction area, sludge-water separation, sludge backflow and membrane water drainage are carried out in the sludge-water separation area, and the sludge-water separation area is divided into a clean water area, a sludge-water automatic separation and sludge power-free automatic backflow area and a sludge area. The membrane assembly is immersed in the clean water area and carries out membrane water drainage through power or gravity. The membrane assembly of the bioreactor is immersed in the clean water area, and pollution of suspension active sludge or other precipitable substance is avoided, so that membrane pollution is quite small, membrane flux is large, the membrane cleaning period is long, the frequency is low, and the treatment cost is low.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a membrane bioreactor with high pollution resistance and a sewage treatment method using the membrane bioreactor. Background technique [0002] A major disadvantage of the membrane process is that after a period of operation, the membrane will be polluted to varying degrees, which will cause the membrane flux to decrease. How to take effective measures to slow down the membrane fouling process and maintain membrane flux is one of the problems faced by membrane process applications. Big challenge. British scholars believe that there are three main factors that affect membrane fouling, namely, the properties of the membrane itself, the properties of activated sludge, and the operating conditions of the membrane bioreactor (MBR). The membrane material determines the hydrophilicity of the membrane and the membrane porosity, the size of the membrane pores will affect the size of the pressu...

AI Technical Summary

Problems solved by technology

However, the concentration of suspended sludge in the reactor still seriously pollutes the membrane, which affects the membrane flux to varying degrees.

These technologies have disadvantages such as large investment, serious membrane fouling, smaller and smaller membrane flux, more and more frequent membrane cleaning, and high processing costs, so they are greatly restricted in practical engineering promotion.

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