Device and method for low-DO synchronous short-range nitrification denitrification phosphorus removal of urban sewage based on real-time control

Abstract

The invention discloses a device and method for low-DO synchronous short-range nitrification denitrification phosphorus removal of urban sewage based on real-time control, and belongs to the field ofbiological treatment of sewage. The method comprises the steps: pumping the urban sewage into a synchronous short-range nitrification denitrification phosphorus-removal SBR, performing anaerobic stirring for 2 hours firstly, adopting phosphorus-accumulating organisms (PAOs) and denitrifying phosphorus-accumulating organisms (DPAOs) to complete anaerobic phosphorus release and synthesis of an internal carbon source PHA, synthesizing PHA also by using glycogen accumulating organisms (GAOs) and denitrifying glycogen accumulating organisms (DGAOs), then introducing the sewage into a low-dissolvedoxygen (DO) aerobic section, adopting AOB to oxidize NH<4><+>-N into NO<2><->, performing aerobic phosphorus absorption through PAOs, using NO<2><-> to perform denitrifying phosphorus removal throughDPAOs, furthermore, adopting PHA and NO<2><-> as an electron donor and an electron acceptor for endogenous denitrification through DGAOs separately, performing synchronous short-range denitrificationdenitrification phosphorus removal in the aerobic section, and finally judging the completion of aeration with an aeration time of 5-8 hours according to the ammonia valley point and the DO abrupt point so as to achieve the purpose of synchronous removal of nitrogen and phosphorus. One SBR is adopted in the process, the process is simple, and a new technology is provided for removal of nitrogen and phosphorus from the sewage.

Description

technical field [0001] The invention relates to a low-DO synchronous short-range nitrification and denitrification phosphorus removal device and method for urban sewage based on real-time control, and belongs to the technical field of sewage biological treatment. Background technique [0002] Traditional sewage biological nitrogen and phosphorus removal faces problems such as insufficient carbon sources, low efficiency of nitrogen and phosphorus removal, and difficulty in reaching the effluent and A standards. In order to solve these problems, new technologies for sewage treatment are constantly being explored and developed. [0003] In recent years, the simultaneous short-range nitrification and denitrification technology has been discovered. This technology can not only carry out aerobic nitrification in the aerobic section, but also simultaneously carry out denitrification. It is an efficient and energy-saving technology. At present, the generally accepted view on the re...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device and method based on real-time control of urban sewage low DO synchronous short-range nitrification and denitrification dephosphorization, to solve the current sewage biological denitrification and phosphorus removal carbon source is insufficient, and the efficiency of nitrogen and phosphorus removal is not high , to deal with high costs and difficulties in meeting Class A discharge standards, in order to achieve stable, efficient and economical denitrification and dephosphorization of sewage

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