A method for quickly establishing a short-range denitrification-anammox coupled denitrification system and its application

Abstract

The invention discloses a method for rapidly establishing a short-range denitrification-anammox coupled denitrification system and its application. The method comprises the following steps: a continuous flow complete mixing reactor based on a novel combined packing, and mechanical stirring is used to keep the packing in a flowing state. state, inoculate anammox bacteria sludge particles in the reactor, use simulated wastewater for dark cultivation, optimize process parameters, and establish a stable biofilm-activated sludge short-range denitrification-anammox (PD / A) Efficient coupling denitrification system. Through the above method, the present invention successfully established a biofilm-activated sludge PD / A high-efficiency coupled denitrification system on the 81st day, which can achieve stable operation and achieve a nitrogen removal rate of 93.89%.

Description

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

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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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