Method for rapidly establishing short-cut denitrification-anaerobic ammonia oxidation coupled denitrification system and application thereof

Abstract

The invention discloses a method for quickly establishing a short-cut denitrification-anaerobic ammonia oxidation coupled denitrification system and application thereof, and the method comprises the following steps: based on a continuous flow complete mixing reactor of a novel combined filler, conducting mechanical stirring to enable the filler to be in a flowing state, inoculating anaerobic ammonia oxygen bacteria sludge particles in the reactor, adopting simulated wastewater for light-proof culture, optimizing technological parameters, and establishing the stable biological membrane-activated sludge short-cut denitrification-anaerobic ammonia oxidation (PD / A) efficient coupling denitrification system. According to the method, a biological membrane-activated sludge PD / A efficient coupling denitrification system is successfully established on the 81st day, stable operation can be achieved, and the removal rate of nitrogen reaches 93.89%.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for quickly establishing a short-range denitrification-anammox coupling denitrification system and its application. Background technique [0002] In recent years, the eutrophication of water body has become more and more serious, but the traditional biological denitrification process has some unavoidable defects and cannot meet the current sewage discharge standards. The anaerobic ammonium oxidation process (Anammox) is recognized as the most promising new wastewater biological denitrification technology due to its economy, efficiency and sustainability. However, the lack of Anammox electron acceptors in actual sewage greatly hinders its engineering. application process. To this end, the researchers proposed two electron acceptor supply schemes for Anammox: short-path nitrification (PN) and short-path denitrification (PD). At present, the research on the short...

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Problems solved by technology

Bioactive fillers can attach a large number of microorganisms. Due to mass transfer resistance, an anaerobic, anaerobic, and aerobic microenvironment is sequentially formed from the inside to the outside, providing suitable living conditions for different microorganisms, and at the same time, it has an effect on anammox bacteria. When it comes to protection, it is conducive to the stable coexistence of microorganisms, but because the microorganisms are loaded on the carrier material, it is less flexible in operation

The currently established short-range denitrification-ANAMMOX high-efficiency coupling denitrification system still has the problems of long time consumption and low denitrification efficiency. For example, the literature "Wang Qiqi, Wang Xiujie, Li Jun, et al. Performance research [J]. Chinese Environmental Science, 2019,39(02):641-647." Disclosed a partial denitrification coupled anammox denitrification system, by adding Glucose, the PD / A process was successfully started on day 94, but the removal rate of total nitrogen was only 88.3%

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