Side multi-stage internal pressure cross-flow membrane bioreactor and ultramicro filtration device

Abstract

The invention discloses a side multi-stage internal pressure cross-flow membrane bioreactor and ultramicro filtration device, and relates to the technical field of membrane biological water treatment or microporous filtration of domestic or industrial sewage. The side multi-stage internal pressure cross-flow membrane bioreactor and ultramicro filtration device comprises a water inlet used for inputting incoming water subjected to biochemical treatment or incoming water needing to be subjected to microporous filtration, a water outlet used for outputting filtered water, a concentrated water outlet used for discharging concentrated water, a backwashing port used for backwashing the microporous filter membrane, a water outlet electromagnetic valve and a backwashing electromagnetic valve used for backwashing control of the microfiltration membrane, a sealing pipe used for packaging the microfiltration membrane, and a microporous filter membrane used for retaining activated sludge and suspended solids and filtering water. Compared with the prior art, the side multi-stage internal pressure cross-flow membrane bioreactor and ultramicro filtration device has the following beneficial effects: by adopting a bypass configuration mode, the installation mode diversification of the membrane bioreactor is realized, and suspended solids and bacteria in water are prevented from being gathered and attached to the inner surface of the microfiltration membrane through cross-flow filtration on the inner surface of the microfiltration membrane, so that the operation and maintenance mode of the membrane bioreactor is greatly simplified. The water production rate is improved, and the construction and operation cost of the membrane bioreactor is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of membrane biological water treatment of domestic or industrial sewage, specifically a membrane bioreactor (abbreviated in English) that adopts bypass configuration, cross-flow filtration on the inner surface of a microporous membrane, does not require aeration, and multi-stage water production for the MBR). Background technique [0002] The traditional membrane bioreactor is arranged in the membrane tank, which can replace the terminal secondary sedimentation tank in the biological treatment technology. Traditional membrane bioreactors use the negative pressure produced by top suction to produce water. The transmembrane pressure is generally 0.016-0.02MPa. Generally, the operation mode of continuous aeration and intermittent water production is adopted. The typical operating time is set as follows: filter for 8 minutes, stop 2 minutes, every 12 hours, back cleaning for 2 minutes, online maintenance cleani...

AI Technical Summary

Problems solved by technology

Traditional membrane bioreactors need to build membrane tanks and bottom aeration, and the construction cost is very high. Generally, the transmembrane pressure is less than 0.02MPa, so the water production rate is relatively low, and frequent stops and backwashing are required during operation, which reduces the operating time. Even with frequent backwashing, frequent fouling of the membrane filaments of the membrane bioreactor is unavoidable. Therefore, the module needs to be taken out of the membrane tank for cleaning or replacement. The cleaning, maintenance or replacement of the module requires a lot of work and costs. cost is also high

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