Moving bed bio-membrane reactor for aquaculture

Abstract

The invention discloses a moving bed bio-membrane reactor for aquaculture, which comprises a reaction tank, hydrophilic suspension filling, an air pump, an air inlet pipe, an aeration pipe, a water inlet pipe and a drain pipe, wherein the specific surface area of the suspension filling is greater than 600m<2> / m<3>; the filling rate of the suspension filling is 27-30% of effective volume of the reaction tank; the air pump is connected with the air inlet pipe; the aeration pipe is laid at the bottom of the reaction tank in a balanced manner and communicated with the air inlet pipe; a plurality of aeration micro-holes are formed in the aeration pipe to allow dissolved oxygen of a water body in the reaction tank to be 2-3mg / L; the water inlet pipe is laid at the upper part of the reaction tank in a balanced manner and communicated with a culture sewage pipe; a plurality of penetrable holes are formed in the water inlet pipe to allow culture sewage to be capable of flowing out of the penetrable holes and realize uniform water distribution; and the drain pipe is arranged at the bottom of the reaction tank, and collects and drains treated water. The reactor has the effects of small floor area, no filling blocking, and significantly improved treatment efficiency of the culture sewage.

Description

technical field [0001] The invention relates to the field of water treatment of aquaculture sewage, in particular to a moving bed biofilm reactor for aquaculture. Background technique [0002] Although there are many kinds of biological contact oxidation processes developed and applied at home and abroad to treat aquaculture sewage, the general design process is: the aquaculture sewage enters the secondary or multi-stage biological contact oxidation tank after the initial precipitation, and then enters the The secondary sedimentation tank separates mud and water, and the biofilm that falls off from the filler forms a sludge discharge system in the secondary sedimentation tank, and the clarified water is discharged as treated water. [0003] The biological contact oxidation tank is mainly composed of tank body, filler, support, aeration device, water inlet and outlet device, and sludge discharge pipe. The filler is a fixed filler, and its standard filling rate is about 75% of...

AI Technical Summary

Problems solved by technology

Although the application of such technology can effectively remove organic pollutants, ammonia nitrogen, nitrite nitrogen, etc., it occupies a large area; if the design or operation is improper, the packing may be blocked; the water distribution and aeration are not uniform, and may There are dead angles in some parts; the water treatment efficiency needs to be further improved, etc.

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