Enhanced nitrification process based on coupled demolding

Abstract

The invention discloses an enhanced nitrification process based on coupled demolding, and belongs to the technical field of sewage treatment. In the sewage nitrification process, under a condition ofkeeping a certain content of dissolved oxygen in a system, extrusion treatments are carried out on an elastic filler so as to generate different deformation degrees, in each extrusion treatment, deepextrusion and shallow extrusion are coupled; deep extrusion is carried out when the system load decreases, the effluent quality is close to an index value, or the system resistance exceeds a designedinflow water distribution pressure; and shallow extrusion is carried out when the system load is stable. Through the combination of deep extrusion and shallow extrusion, on one hand, demolding and redistribution of a bio-membrane filler can be realized, the mass transfer efficiency is improved, on the other hand, dissolved oxygen inside and outside the bio-membrane filler can be distributed more uniformly, through the synergistic effect of deep extrusion and shallow extrusion, the nitrification reaction is enhanced, the sewage treatment efficiency is improved, and the effluent quality is recovered.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically, relates to a coupled de-filming enhanced nitrification treatment process. Background technique [0002] With the continuous development of my country's social economy, sewage discharge standards have become increasingly strict, and the problem of nitrogen pollution in water bodies has become increasingly serious, which has become an important factor affecting the water environment and restricting the sustainable development of the economy and society. Therefore, how to remove ammonia nitrogen in sewage with high efficiency and low consumption has become an urgent focus in the field of water treatment. [0003] Sewage biological treatment technology, according to the growth mode of microorganisms in the treatment structure, can be divided into two categories: the activated sludge method of microbial suspension growth and the biofilm method of microbial fixed growth. Among...

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Problems solved by technology

[0009] In view of the low mass transfer efficiency of the biofilm method in the prior art when carrying out nitrification biological reactions, the biofilm is easy to congest and agglomerate, and when the filler is clogged, the utilization rate of dissolved oxygen in the system is reduced, resulting in a decrease in the nitrification load , the present invention provides a process based on coupled defilming enhanced nitrification treatment, through the combination of shallow extrusion and deep extrusion, it can not only realize the defilming and redistribution of biofilm fillers, improve the mass transfer efficiency, and effectively prolong the system height. The cycle of load operation; it can also promote the distribution of dissolved oxygen inside and outside the biofilm filler to be more stable and uniform, and a variety of factors work together to strengthen the nitrification reaction efficiency and maintain stable water quality;

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