Method for realizing quick start and stable maintenance of short-cut nitrification of pilot-scale low-temperature urban sewage at ultrahigh NO2<-> accumulation rate
A technology for urban sewage and short-range nitrification, applied in water/sludge/sewage treatment, chemical instruments and methods, water aeration, etc., can solve problems such as long start-up time and difficulty in maintaining stable short-range nitrification
Pending Publication Date: 2022-01-07
BEIJING UNIV OF TECH
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[0005] The present invention uses a super high NO 2 - Accumulation rate realizes the rapid start and stable maintenance of short-range nitrification of urban sewage at pilot scale, in order to solve the problem that the short-range nitrification of urban sewage has a long start-up time and it is difficult to achieve stable maintenance of short-range nitrification under low temperature conditions
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[0016] In order to describe in more detail a kind of ultra-high NO 2 - Accumulation rate realizes the method for quick start and stable maintenance of pilot-scale low-temperature urban sewage short-range nitrification, which is further illustrated by specific examples. For the reactor form ( figure 1 ) is a sequence batch reactor (SBR), and the system device includes a water inlet tank (1), a sequence batch reactor (2), a PLC control cabinet (3), a water outlet tank (4), and a display (5); The water tank (1) pumps sewage into the sequencing batch reactor (2) through the water inlet pump (2.9) to complete the water inlet; the aeration pump (2.1) is connected to the aeration pan (2.10) through the rotameter (2.2); The water outlet tank (4) is connected with the sequence batch reactor (2) through the electric drain valve (2.8); the detection device pH probe (2.5), the DO probe (2.6) is connected with the water quality online detector (2.3); the PLC control cabinet ( 3) Connect ...
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The invention discloses a method for realizing quick start and stable maintenance of short-cut nitrification of pilot-scale low-temperature urban sewage at an ultrahigh NO2<-> accumulation rate, and belongs to the technical field of biological treatment of urban sewage. The method comprises the following specific steps: (1) by taking reflux sludge of a secondary sedimentation tank as seed sludge and taking inlet water as urban sewage, elutriating nitrifying bacteria in an anaerobic / aerobic operation mode in a manner of enhancing biological phosphorus removal; (2) changing the operation mode into an anaerobic / aerobic / anoxic mode, and prolonging aerobic operation time and sludge age to quickly enrich ammonia oxidizing bacteria to realize quick start of short-cut nitrification; and (3) controlling the residual ammonia nitrogen to be 5-10 mg / L in combination with a real-time online ammonia nitrogen probe so as to realize long-term stable maintenance of short-cut nitrification. According to the invention, the method is simple to control and convenient to operate, not only can realize quick start of short-cut nitrification, but also can realize long-term stable maintenance of short-cut nitrification in a low-temperature environment.
Description
technical field [0001] The invention belongs to the technical field of water treatment, in particular to a 2 - The accumulative rate realizes the quick start and stable maintenance of pilot-scale low-temperature short-range nitrification of urban sewage, which is suitable for urban sewage treatment. Background technique [0002] The deep denitrification of sewage is extremely important for the protection of water resources. In recent years, new high-efficiency and sustainable denitrification processes using nitrite as electron acceptor have attracted great attention in the field of sewage treatment, such as short-range nitrification and denitrification, short-range nitrification coupled with anammox, and short-range nitrification with anammox coupled with denitrification. Nitrification, short-range denitrification coupled with anammox. It is not difficult to see that nitrite is the reaction substrate or intermediate medium of the new denitrification process, and how to ob...
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Login to View More IPC IPC(8): C02F3/30C02F7/00
CPCC02F3/30C02F7/00C02F2209/06C02F2209/14C02F2209/40C02F2209/005Y02W10/10
Inventor 彭永臻王梓豪张亮
Owner BEIJING UNIV OF TECH