Segmented drainage type short-cut nitrification parallelly-connected anaerobic ammonia oxidation denitrifying phosphorous removal coupled endogenous denitrification device and method thereof

Abstract

The invention discloses a segmented drainage type short-cut nitrification parallelly-connected anaerobic ammonia oxidation denitrifying phosphorous removal coupled endogenous denitrification device and a method thereof. Municipal sewage firstly enters a short-cut nitrification phosphorous removal reactor, denitrifying glycogen accumulating bacteria ingest the organic matter and store it as PHAs, and phosphorus-accumulating bacteria store internal carbon source and simultaneously release phosphorous; then, phosphorus is absorbed and ammonia nitrogen is converted to nitrite nitrogen under the hypoxia aeration mode, and nitrosated sewage undergoes first water draining and enters an intermediate water tank; and after anaerobic stirring and denitrification, secondary water draining is carried out. A part of raw water enters an anaerobic ammonia oxidation denitrifying phosphorus removal coupled endogenous denitrification reactor, denitrifying glycogen accumulating bacteria store PHAs, and denitrifying phosphorus accumulating bacteria store an internal carbon source and release phosphorous. After the stage, nitrite nitrogen-containing sewage in the intermediate water tank enters the anaerobic ammonia oxidation denitrifying phosphorus removal coupled endogenous denitrification reactor to realize deep nitrogen and phosphorus removal. By the method, municipal sewage deep nitrogen and phosphorus removal with low C/N ratio can be stably realized.

Description

technical field [0001] The invention relates to a segmented drainage type short-range nitrification parallel anaerobic ammonium oxidation denitrification denitrification coupled with endogenous denitrification to realize deep denitrification and dephosphorization process of domestic sewage, which belongs to the technical field of sewage biological treatment. Background technique [0002] my country is a country with severe drought and water shortage. Although fresh water resources rank fourth in the world, the per capita water resources are only 2300m 3 , which is 1 / 4 of the world average level. At the same time, with the acceleration of industrialization and urbanization in our country, wastewater discharge and water pollution are becoming increasingly serious, and the form of water pollution is still very serious. Among them, the most prominent problem is the eutrophication of water bodies. The discharge of excessive N and P elements into water bodies is the main cause of...

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Problems solved by technology

However, the anaerobic ammonium oxidation process can only remove nitrogen and cannot remove phosphorus

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