A process based on coupled stripping and enhanced nitrification

Abstract

The invention discloses a process for strengthening nitrification treatment based on coupled type stripping and belongs to the technical field of sewage treatment. During the nitrification treatment process of sewage, under the condition of maintaining a certain content of dissolved oxygen in the system, the elastic filler is subjected to extrusion treatment with different degrees of deformation. The extrusion treatment includes the coupling of deep extrusion and shallow extrusion. , the deep extrusion is carried out when the system load drops, the outlet water quality is close to the target value or the system resistance exceeds the design inlet water distribution pressure, and the shallow extrusion is carried out when the system load is stable. The present invention combines deep extrusion and shallow extrusion, on the one hand, it can realize the release and redistribution of the biofilm filler, improve the mass transfer efficiency, and on the other hand, it can promote a more uniform distribution of dissolved oxygen inside and outside the biofilm filler. The synergistic effect of the two can strengthen the nitrification reaction, improve the efficiency of sewage treatment, and restore the quality of effluent water.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a process for strengthening nitrification treatment based on coupled type stripping. Background technique [0002] With the continuous development of our country's social economy and increasingly stringent sewage discharge standards, 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 economy and society. Therefore, how to remove ammonia nitrogen in sewage efficiently and at low cost 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 the suspended growth of microorganisms and the biofilm method of the fixed growth ...

AI Technical Summary

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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