Method for improving activity of nitrification function microbiology in activated sludge through directly feeding Fe ions

Abstract

The invention provides a method for improving the activity of nitrification function microbiology in activated sludge through directly feeding Fe ions, which comprises a cultivation stage of the nitrification function microbiology and a long-time running activity maintenance stage. In a saprobiont denitrification system, ferric salt chemical agent with Fe <2+> or Fe<3+> is directly fed into an activated sludge mixture of an aerobic pond of a biology denitrification system, and basic compounds are also fed simultaneously; and in the long-time running activity maintenance stage of nitrificationfunction microbiology, the feeding amount of the ferric salt chemical agent with the Fe <2+> or the Fe<3+> is gradually reduced, and the fed ferric salt chemical agent with the Fe <2+> or the Fe<3+> is only used for replenishing loss amount of the Fe<3+> or the Fe <2+>. According to the method, the biochemical reaction metabolic activity of the nitrification function microbiology can be effectively improved, the breeding of the nitrification function microbiology and the secretion of endoenzyme of microbial cell are promoted, the applicability of saprobiont denitrification technology is improved, the bottleneck problems existing in the saprobiont denitrification system are solved, and the low temperature resistant capacity of the system is obviously improved.

Description

technical field [0001] The invention relates to a method for improving the nitrifying ability of nitrifying microorganisms in activated sludge used for sewage biological denitrification treatment under low temperature conditions, and belongs to the technical field of sewage treatment. Background technique [0002] Activated sludge method is a biological treatment method of sewage, which removes organic matter in sewage through microorganisms in activated sludge, and simultaneously removes a part of phosphorus and nitrogen. The traditional activated sludge sewage biological treatment system is composed of an aeration tank (aerobic tank), a sedimentation tank, a sludge return system and an excess sludge removal system. Continuous mixed culture is carried out to form activated sludge, and the microbial coagulation, adsorption and oxidation in activated sludge are used to decompose and remove organic pollutants in sewage. Then the sludge and water are separated, and most of the...

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Problems solved by technology

[0007] The present invention aims at the problem of the influence of low temperature conditions on the activity of nitrifying microorganisms, and provides a method for directly adding Fe ions (Fe 3+ or Fe 2+ ) A method for improving the activity of nitrifying microorganisms in activated sludge. This method can effectively solve the problems of poor operational stability and the influence of low temperature on the activity of nitrifying microorganisms in the existing sewage biological denitrification system, and improve the biochemical reaction activity of nitrifying microorganisms. Improving the ability of biological denitrification system to resist low temperature

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