Enhanced nitrogen and phosphorus removal process adopting mud water separation anaerobic/anoxic-membrane bioreactor

Abstract

The invention relates to an enhanced nitrogen and phosphorus removal process adopting a mud water separation anaerobic/anoxic-membrane bioreactor and belongs to a nitrogen and phosphorus removal process for environmental sewage. The enhanced nitrogen and phosphorus removal process adopting the mud water separation anaerobic/anoxic-membrane bioreactor is characterized in that an anaerobic/anoxic-membrane bioreactor provided with a built-in three-phase separator and a membrane bioreactor form a two-sludge system, so that a nitrogen and phosphorus removal function is enhanced. The enhanced nitrogen and phosphorus removal process comprises the following steps: firstly, causing sewage to enter an anaerobic/anoxic reactor, releasing phosphorus under the anaerobic condition, carrying out mud water separation on the sewage by virtue of the three-phase separator, and carrying out aerobiotic nitrification on supernate automatically flowing to the membrane bioreactor; after nitrification is finished, feeding a nitrification liquid into the anaerobic/anoxic reactor in a circulating manner and carrying out denitrifying phosphorus removal, circulating supernate of the anaerobic/anoxic reactor to an anaerobic membrane bioreactor, feeding water and draining membrane filtration water synchronously after circulation is finished, and finally discharging rich phosphorous sludge for realizing phosphorus removal. The enhanced nitrogen and phosphorus removal process adopting the mud water separation anaerobic/anoxic-membrane bioreactor has the advantages that effective separation of phosphorus-accumulating bacteria and nitrifying bacteria is realized, denitrifying phosphorus removal efficiency is enhanced, carbon source is saved, operating cost is reduced, a technological process is simple, and operation is easy.

Description

technical field [0001] The invention relates to a denitrification and dephosphorization process for environmental sewage, in particular to an anaerobic / anoxic-membrane bioreactor denitrification and dephosphorization process for strengthening mud-water separation. Background technique [0002] With the rapid development of society, the waste water rich in nitrogen and phosphorus produced in people's life and production is increasing day by day, and discharged into water bodies, resulting in eutrophication of water bodies and serious environmental problems. On the other hand, with the improvement of the quality of life, people's requirements for the environment are also constantly improving, and the contradiction between the two has gradually become prominent. The increasingly stringent sewage discharge standards are a common development trend and an urgent requirement at present. The removal of nitrogen and phosphorus for the purpose of controlling eutrophication has become ...

AI Technical Summary

Problems solved by technology

[0005] Technical problem: the purpose of the present invention is to overcome the deficiencies in the prior art, to provide a kind of enhanced mud-water separation anaerobic / anoxic-membrane bioreactor denitrification and phosphorus removal process, to solve the poor mud-water separation effect of the existing technology, Problems of large number of reactors, complex piping, and cumbersome operation

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