Gravity-flow membrane bioreactor with low energy consumption

Abstract

The invention provides a gravity-flow membrane bioreactor with low energy consumption. The gravity-flow membrane bioreactor comprises a reactor tank, a guide cylinder, an aerator, a MBR membrane assembly, an inflow water distribution system, a MBR fan, a process fan, a vacuum suction system, a constant-flow automatic regulation system and an internal sludge circulation system. According to the invention, a MBR membrane is arranged on the top of the bioreactor and siphon is realized through full use of liquid level difference, so power-free water production is realized; since the MBR membrane assembly is located on the upper part of a biochemical aeration system, air for biochemical aeration can be fully used again for scrubbing of the membrane, so considerable air needed in scrubbing of the membrane is saved; and an anoxic area is formed in the bottom of a reaction zone, so a high-efficiency A / O denitrification function is obtained. The gravity-flow membrane bioreactor provided by the invention is a high-efficiency biochemical system realizes organic combination of power-free water production, reduction in air demand, high oxygen transfer efficiency, integrated anoxic / aerobic treatment, sludge backflow without extra power, production of high-quality water and the like.

Description

technical field [0001] The invention relates to a mechanical device, in particular to a low-energy self-flowing membrane bioreactor. Background technique [0002] According to the actual water quality requirements, the current conventional wastewater treatment process is mostly the biological treatment process of A / O-secondary settling tank or the improvement or deformation process of traditional A / O-secondary settling tank, which is also one of the most mature water treatment processes at present. . However, the A / O-Secondary Settling Tank process can no longer meet the high emission standards and reuse requirements in today's increasingly demanding discharge and reuse requirements. In this context, the MBR membrane process has also been widely used. The MBR membrane module is used to replace the traditional secondary sedimentation tank. The membrane module is placed at the end of the aerobic tank or in a separate membrane tank, and the produced water is pumped by the suct...

AI Technical Summary

Problems solved by technology

[0009] 5. Conventional pool depth design leads to low oxygen transfer efficiency of the system; although the floor area is greatly reduced compared with traditional technology, it still cannot change the increasingly scarce demand of existing land

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