Device and method for improving A2NSBR two-sludge denitrification denitriding and phosphorus removal process on basis of DEAMOX technology

Abstract

The invention provides a device and a method for improving an A2NSBR two-sludge denitrification denitriding and phosphorus removal process on the basis of a DEAMOX technology, and belongs to the fieldof municipal wastewater biological treatment. The device mainly consists of a raw water tank, an A / A / O-SBR reactor, a first middle water tank, an N-SBR reactor and a second middle water tank. The method comprises the following steps that partial urban domestic sewage firstly enters the A / A / O-SBR reactor; denitrification phosphorus-accumulating bacteria release phosphorus under the anaerobic conditions; meanwhile, an outer carbon source in the sewage is absorbed and is converted into an inner carbon source PHA; after static precipitation, liquid supernatant enters the N-SBR reactor for nitration reaction; after the nitration reaction is completed, still standing precipitation is performed; the liquid supernatant flows back to an anoxic stage of the A / A / O-SBR reactor; denitrification phosphorus removal reaction, short-process denitrification reaction and anaerobic ammoxidation reaction are performed; then, micro aeration is performed to complete the rest phosphorus absorption and nitrogen gas blowing removal; then, still standing water discharge is performed. The double-sludge theory and the denitrification phosphorus removal and DEAMOX technology are used; the problem of too high ammonia and nitrogen content in outlet water of a conventional A2N process is solved; the deep denitriding is realized.

Description

technical field [0001] The present invention relates to an improved A 2 The device and method of the N double sludge denitrification denitrification and dephosphorization process belong to the technical field of sewage treatment, and are applicable to the fields of sewage treatment such as new urban sewage treatment plants or upgrading of old water plants, treatment of municipal domestic sewage and industrial waste water, and the like. Background technique [0002] On a global scale, eutrophication caused by nutrients such as nitrogen and phosphorus has become the focus of water pollution control, and how to efficiently remove nitrogen and phosphorus has become a difficult and core issue. A common feature of domestic sewage in China is the lack of carbon sources, which often cannot meet the requirements of nitrogen and phosphorus removal at the same time. In addition, the sludge age contradiction between nitrifying bacteria and phosphorus accumulating bacteria, and the compe...

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Problems solved by technology

[0004] Traditional A 2 The NSBR process adopts denitrification and phosphorus removal technology. The sludge of phosphorus accumulating bacteria and nitrifying bacteria is separated in different reactors. The denitrification and phosphorus removal effect is good, but the traditional A 2 The NSBR process has the problem of high ammonia nitrogen concentration in the effluent, which limits the popularization and application of this technology

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