Improved A/O-MBR integrated device and sewage treatment method thereof

Abstract

The invention discloses an improved A/O-MBR integrated device and a sewage treatment method thereof. The improved A/O-MBR integrated device comprises an aerobic tank, an anoxic tank and an MBR membrane tank, wherein the aerobic tank is isolated from the anoxic tank by a partition board; muddy water circulation channels are arranged at the upper end and the lower end of the partition board; aerators are arranged in the aerobic tank; a sewage inlet is formed in the aerobic tank; an impound outlet pipeline is arranged on a membrane component of the MBR membrane tank; the anoxic tank is separatedfrom the MBR membrane tank by means of a baffle; slopes at the bottoms of the aerobic tank, the anoxic tank and the MBR membrane tank form a bucket-shaped tank bottom; and an aerated mud discharge pipe is arranged at the lowest part of the tank bottom. Through the adoption of the device, the problems of insufficient carbon source, nitrate delivery obstacle and the like in the traditional A/O-MBR device are solved, and the sewage purifying efficiency is effectively improved; the deposited activated sludge is guided at the position of the aerated mud discharge pipe, and is fed in the reaction area of the aerobic tank through aeration of the aerated mud discharge pipe, so that the activated sludge utilization rate is improved, sewage is pumped away from the aerated mud discharge pipe by a sewage pump in necessity; and the sewage treatment method of the integrated device is simple to operate, and the sewage purification degree is high.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an improved A / O-MBR integrated device and a sewage treatment method thereof. Background technique [0002] In the traditional A / O-MBR membrane bioreactor, the anoxic reaction pool and the aerobic reaction pool are generally combined, and it is only a connection between the simple reaction units. Such a combination leads to no coupling between the two reaction units. When the former is combined, the pre-anoxic mode may prevent the nitrate electron acceptor produced by the aerobic unit reaction from effectively reaching the anoxic unit, and the post-anoxic mode may cause insufficient carbon sources for denitrifying bacteria, so it cannot be efficiently Degrade ammonia nitrogen. Limited to the connection mode between the anoxic pool and the aerobic pool, the microbial population attributes in each reaction unit area are relatively single, and the sewage purification efficiency of th...

AI Technical Summary

Problems solved by technology

[0002] In the traditional A / O-MBR membrane bioreactor, the anoxic reaction pool and the aerobic reaction pool are generally combined, and it is only a connection between the simple reaction units. Such a combination leads to no coupling between the two reaction units. When the former is combined, the pre-anoxic mode may prevent the nitrate electron acceptor produced by the aerobic unit reaction from effectively reaching the anoxic unit, and the post-anoxic mode may cause insufficient carbon sources for denitrifying bacteria, so it cannot be efficiently Degradation of ammonia nitrogen

Limited to the connection mode between the anoxic pool and the aerobic pool, the microbial population attributes in each reaction unit area are relatively single, and the sewage purification efficiency of the treatment system is low

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