Membrane bioreactor process for removing phosphorus without mud discharge

Abstract

The invention provides a membrane bioreactor process for removing phosphorus without mud discharge. In the process, arrangement of an aeration system is optimized, the aeration intensity is concentrated under a membrane assembly to form an aerobic zone in a local membrane area so as to provide biochemical reaction condition for aerobic phosphorus uptake of microorganisms; sewage rises to the upper part of the membrane area from the membrane area through a circular flow field state; because dissolved oxygen is quickly utilized by the microorganisms in the middle lower part of the membrane area, a facultative an aeration area is basically formed on the upper part of the membrane area and outside the membrane assembly, and the microorganisms release phosphorus in the facultative an aeration area; enrichment and growth of phosphate reducing bacteria in the system can be realized by the trapping effect of a microfiltration membrane so as to provide conditions for gasification removal of phosphorus; and a novel phosphorus removal method can be realized by constructing the biochemical reaction environment suitable for gasification removal of phosphorus so as to avoid the traditional process route of mud discharge phosphorus removal.

Description

technical field [0001] The invention relates to a membrane bioreactor process, in particular to a membrane bioreactor process capable of removing phosphorus without sludge discharge. Background technique [0002] At present, the typical phosphorus removal process includes a combination of facultative and aerobic biochemical treatment processes. The phosphorus-accumulating microorganisms in activated sludge absorb excessive phosphorus in sewage under aerobic conditions, and return the sludge to anaerobic or facultative processes. The absorbed phosphorus is released under certain conditions. Its mechanism is the application of microbial aerobic phosphorus uptake, and the removal of phosphorus from the sewage treatment system is achieved by discharging part of the sludge. Therefore, sludge removal and phosphorus removal have become the main technology for phosphorus removal in sewage treatment at present. This method mainly has the following problems in practical engineering a...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new membrane bioreactor process without sludge removal and phosphorus removal, which overcomes the difficulty and large area of ​​sludge disposal in existing conventional biochemical treatment processes and membrane bioreactor processes through sludge removal and phosphorus removal Defects