A method and device for a jet-air-lift split membrane bioreactor

Abstract

The invention provides a method for manufacturing a jet gas-stripping type independent membrane bioreactor as well as a device used for realizing the method. A jet aerator is adopted to replace the traditional blower for realizing the stripping effect of a membrane module, thereby greatly reducing the operational energy. Partial circulation solution in a bio-aeration pool flows through the jet aerator at a high speed to generate negative pressure for sucking air in, a fast mixed gas-liquid two-phase flow which is evenly ejected into the membrane module through a novel water and air distributing device is formed, continuous and effective washing and air bump rinse are carried out, the pollution of the membrane is effectively reduced and the service life of the membrane is prolonged. The violent agitation function produced by the jet aerator also increases the mass-transfer velocity in the mixed solution, so as to speed up the biochemical reaction and improve the treatment efficiency. The operational energy of the method is low, the pollution degree of the membrane is reduced, and the initial investment of the equipment is decreased. The structure of the device is simple, the occupied area is small, the operation is easy, and the automatic operation and the operation control are convenient.

Description

technical field [0001] The invention relates to a method for jet-air-lifting separate membrane bioreactors and a device for realizing the method, belonging to the technical fields of sewage treatment and reuse, and membrane bioreactors. Background technique [0002] With the rapid development of modern industry, the scale of cities continues to expand, water consumption continues to increase, and water resources are becoming increasingly scarce. In order to solve the problem of water shortage, many countries have carried out research on sewage recycling. Membrane bioreactor (Membrane Bioreactor, MBR) has received widespread attention due to its excellent and stable effluent quality. MBR is a new high-efficiency sewage treatment process that organically combines membrane separation and biological treatment technology. It replaces the secondary sedimentation tank in the traditional activated sludge process with membrane modules, and completely separates mud and water through ...

AI Technical Summary

Problems solved by technology

However, due to the uneven mixing of gas and liquid, the membrane modules of this system are prone to local pollution.

And the blower aeration makes the system process complicated, the control is cumbersome, and the operating energy consumption is still high

In actual operation, it is also prone to the danger of the mixed liquid being poured into the blower due to improper operation.

In order to solve the above problems, researchers at home and abroad have done a lot of research and made some progress, but these methods have certain shortcomings, and there are still few effective methods in practical applications.

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