Device and method for realizing advanced nitrogen and phosphorus removal of municipal sewage by coupling integrated short-cut nitrification with anaerobic ammonia oxidation denitrification phosphorus removal

Abstract

The invention discloses a device and a method for realizing advanced nitrogen and phosphorus removal of municipal sewage by coupling integrated short-cut nitrification with anaerobic ammonia oxidationdenitrification phosphorus removal. The device comprises a municipal sewage raw water tank and a short-cut nitrification coupling anaerobic ammonia oxidation denitrification phosphorus removal reactor. The method comprises the following steps: firstly, municipal sewage enters a short-cut nitrification coupled anaerobic ammonia oxidation denitrification phosphorus removal reactor, phosphorus-accumulating bacteria and denitrifying phosphorus-accumulating bacteria store an internal carbon source and release phosphorus at the same time, and denitrifying glycogen-accumulating bacteria take in organic matters and convert the organic matters into PHAs to be stored in vivo; then steps of low-oxygen aeration, phosphorus absorbing by phosphorus-accumulating bacteria, converting of part of ammonia nitrogen into nitrite nitrogen are carried out, and anaerobic ammonia oxidation is performed on the residual ammonia nitrogen and the generated nitrite nitrogen to realize denitrification; and the generated nitrate nitrogen is used as an electron acceptor of denitrifying phosphorus-accumulating bacteria to perform excessive absorption of phosphate, thereby achieving the effect of synchronous nitrogen and phosphorus removal. After the stage is completed, anoxic stirring is performed for advanced treatment, and the method can stably realize advanced nitrogen and phosphorus removal of low-C / N municipal sewage.

Description

technical field [0001] The invention relates to an integrated short-range nitrification coupling anaerobic ammonium oxidation denitrification dephosphorization process for deep denitrification and dephosphorization of urban sewage, which belongs to the technical field of sewage biological treatment. Background technique [0002] With the continuous development of human social activities, the current ecological environment in the world is becoming more and more severe. The problem of water pollution is becoming increasingly prominent. Major lakes such as Taihu Lake and Chaohu Lake have experienced serious water eutrophication. The main pollution indicators include ammonia nitrogen, phosphorus and organic matter. In order to prevent such pollution indicators from being carried into natural water bodies in large quantities and cause algal blooms, effective removal of such nutrients in sewage is of great significance for controlling eutrophication of water bodies and protectin...

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Problems solved by technology

[0004] The present invention proposes a device and method for integrated short-range nitrification coupled with anaerobic ammonium oxidation and denitrification denitrification, and combines short-range nitrification with anaerobic ammonium oxidation and denitrification for denitrification of urban sewage with relatively low C / N In the process of phosphorus removal, it solves the thorny problems of traditional processes such as large energy consumption, insufficient carbon source, and large sludge output.

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