Biological contact oxidation film bioreactor

Abstract

The invention relates to a kind of living-thing contacting oxide-film biological reactor, which is mainly composed with living-thing contacting oxidation reactor, aeration tube, medium trough, film box, film component part, suction pump, flowmeter, and so on. The feature of the invention lies in that as follows: biological treatment unit uses living-thing contacting oxidation reactor, so that it has advantages, such as high space loading, low sludge yield, no sludge inflation problem, convenient operation and maintenance, and so on. Film separating unit is separated with biological treatment unit, so it doesn't need circulating pipe and reflux valve, because of which, it can decline construction and operation cost, and also can operate easily. Outlet water that treated by living-thing contacting oxide-film biological reactor of the invention has excellent water quality, the film has long service life, and also it has simple construction and operation, convenient maintenance, and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of membrane bioreactors, and in particular relates to a split-type membrane bioreactor combining biological contact oxidation water treatment technology and membrane separation technology. Background technique [0002] The split-type membrane bioreactor is composed of a bioreactor unit and a membrane separation unit. Its characteristics are: the system is stable and reliable, easy to operate and manage, and easy to clean, replace and add membranes. Early split membrane bioreactors used cross-flow membrane modules. In order to maintain a stable water permeability, the cross-flow membrane separator requires a high membrane surface velocity, and the resulting shear force or turbulent flow limits the thickness of the filter cake layer formed on the surface of the membrane filament. A higher membrane surface flow rate requires a larger circulating water pump to provide a higher circulating water volume, resultin...

AI Technical Summary

Problems solved by technology

However, a higher sludge concentration will have a negative impact on the membrane flux, resulting in a reduction in the ability of the membrane bioreactor to treat wastewater

At the same time, a higher sludge concentration is likely to cause membrane fouling. In order to reduce membrane fouling, a higher aeration volume is required, so the aeration power consumption per unit of water treatment increases.

In addition, the activated sludge method is prone to sludge swelling, which reduces the quality of the treated effluent, increases the viscosity of the mud-water mixture, and causes membrane clogging.

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