Device and method for treating low-carbon urban sewage through synchronization of anaerobic ammonia oxidation coupling denitrifying phosphorus removal and endogenous denitrification

Abstract

The invention discloses a device and method for treating low-carbon urban sewage through synchronization of anaerobic ammonia oxidation coupling denitrifying phosphorus removal and endogenous denitrification, and belongs to the field of biological sewage treatment. Urban sewage enters an endogenous denitrification coupling dephosphorization SBR reactor for anaerobic stirring, energy is provided for glycogen inside denitrification glycogen-accumulating organisms decomposition cells, volatile fatty acid VFA in sewage is absorbed for synthesizing an internal carbon source PHA to be stored into the body, meanwhile, the denitrification phosphate-accumulating organisms are subjected to anaerobic phosphorus release, and VFA in the sewage is absorbed for synthesizing PHA to be stored into the body; after anaerobic stirring is finished, precipitation and drainage are performed, outlet water is drained into a middle water tank; then, water containing ammonia nitrogen and phosphate in the middle water tank is made to enter an integrated partial nitrification anaerobic ammonia oxidation SBR reactor, intermittent hypoxia aeration stirring is performed, and water is drained and drained into a water outlet tank; the outlet water of the integrated partial nitrification anaerobic ammonia oxidation SBR reactor is made to enter the endogenous denitrification coupling dephosphorization SBR reactor for hypoxia aeration stirring. According to the method, organic carbon sources in raw water are efficiently utilized, and the aeration rate is saved.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a device and method for anaerobic ammonium oxidation coupling denitrification and phosphorus removal and synchronous endogenous denitrification treatment of low-carbon urban sewage. Background technique [0002] Substandard discharge of sewage nitrogen and phosphorus is the direct cause of water eutrophication. According to statistics, 30% to 40% of lakes and reservoirs in the world are affected by eutrophication to varying degrees, and my country has become one of the countries with serious lake eutrophication in the world. According to the survey of 26 lakes, eutrophication accounted for only 27% in the late 1970s, 61% in the late 1980s, and as high as 85% in the late 1990s. After 2000, it developed more rapidly. For example, Yunnan Dianchi Lake, Chaohu Lake, and Taihu Lake have all been significantly polluted, and water eutrophication has occurred. Theref...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a device and method for anaerobic ammonium oxidation coupling denitrification and phosphorus removal synchronous endogenous denitrification treatment of low-carbon urban sewage, to realize the synchronous removal of low C / N ratio urban sewage under the condition of no external carbon source Nitrogen and phosphorus removal, solving the problems of insufficient carbon source, nitrogen and phosphorus removal cannot be optimal at the same time in the traditional nitrogen and phosphorus removal process

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