Method for improving activity of nitrification function microbiology in activated sludge through feeding iron hydroxide during in situ preparation

Abstract

The invention provides a method for improving the activity of nitrification function microbiology in activated sludge through feeding iron hydroxide during in situ preparation. The method comprises a cultivation stage of the nitrification function microbiology and a long-time running activity maintenance stage. The cultivation stage is characterized in that: the activity of the nitrification function microbiology is improved through in situ preparation of active sludge system equipment and feeding of ultramicron iron hydroxide. The long-time running activity maintenance stage refers to feeding ferric salt chemical agent into an activated sludge mixture directly so as to replenish ferrum lost due to excess sludge emission. The in situ preparation of iron hydroxide is realized through chemical reaction between ferric trichloride solution and sodium bicarbonate solution which are mixed in a centrifugal pump. According to the method, the problems that in the existing saprobiont denitrification system, the running stability is poor, and low temperature has impact on the activity of the nitrification function microbiology, can be effectively solved, the biochemical reaction activity of the nitrification function microbiology is improved, and the low temperature impact resistant capacity of the biology denitrification system is 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...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the influence of low temperature conditions on the activity of nitrifying functional microorganisms, the present invention provides a method for on-site preparation and dosing of ferric hydroxide to improve the activity of nitrifying functional microorganisms in activated sludge. The sludge system (sewage biological denitrification system) is used to improve the activity of nitrifying microorganisms, which can effectively solve the problems of poor operational stability and the impact of low temperature on the activity of nitrifying microorganisms in the existing sewage biological denitrification system, and improve the nitrifying microorganisms. Biochemical reaction activity, improve the ability of biological denitrification system to resist low temperature

Images