Anaerobic membrane bioreactor for sewage treatment and composite cleaning method of membrane module

Abstract

The invention discloses an anaerobic membrane bioreactor for sewage treatment and a composite cleaning method of a membrane module. An aerobic reaction zone, an anaerobic reaction zone and a recycle water zone are arranged inside a membrane bioreactor shell disclosed by the invention; sewage input by a sewage input pipe enters the bottom of the aerobic reaction zone, a gas of the aerobic reaction zone and sewage after aerobic reaction are input to the bottom of the anaerobic reaction zone; the membrane module is arranged inside the anaerobic reaction zone; the water after anaerobic reaction enters the recycle water zone through a physical nitrogen and phosphorus removal zone; and the recycle water zone outputs the processed sewage. By adopting the sewage processor disclosed by the invention, the membrane module reacts under an anaerobic environment, the residual sludge can be obviously reduced, meanwhile, pollution of the membrane module can be retarded, energy consumption is reduced, and the sludge quantity and the sludge concentration are reduced. By adopting the composite cleaning method disclosed by the invention, the pollution layer can be more deeply cleaned by carrying out recycle water backflush cleaning and chemical and physical combined backflush cleaning on the member module, the dropping speed of a pollutant is accelerated, and the effect is greatly higher than that of soaking cleaning by a single drug.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a composite cleaning method for an anaerobic membrane bioreactor for sewage treatment and a membrane component. Background technique [0002] Membrane bioreactor is a representative water treatment device that has developed rapidly in recent years. It can not only replace the secondary sedimentation tank of the traditional device, but also can significantly improve the effluent quality. [0003] Most of the current membrane bioreactors are aerobic reactions, and an aeration device needs to be provided below the membrane module to generate an aerobic reaction environment. Under the aerobic reaction environment, the aerobic bacteria have a short reproductive cycle and die quickly, forming a large amount of phosphorus-containing sludge. Aerobic bacteria are prone to produce colloidal flora, which have strong adhesion, cause serious pollution to membrane components, and ...

AI Technical Summary

Problems solved by technology

Aerobic bacteria are easy to produce gelatinous bacteria clusters, which have strong adhesion, seriously pollute the membrane modules, and easily block the membrane

At present, the common cleaning methods for membrane components are mostly single cleaning methods, and the effect is not ideal.

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