Method used for realizing whole-course autotrophic nitrogen removing via anaerobic ammonium oxidation immobilization

Abstract

The invention discloses a method used for realizing whole-course autotrophic nitrogen removing via anaerobic ammonium oxidation immobilization, and belongs to the field of sewage treatment. According to the method, polyvinyl alcohol is mixed with sodium alginate for anaerobic ammonium oxidation cell immobilization, and prepared anaerobic ammonium oxidation gelled pills are applied to a whole-course autotrophic nitrogen removing system. A device comprises a raw water tank, a biological decarbonizing reactor, a middle water tank, and a whole-course autotrophic nitrogen removing reactor. According to the method, the anaerobic ammonium oxidation gelled pills obtained via imbedded immobilization and partial nitrification sludge are delivered into the whole-course autotrophic nitrogen removing reactor, problems of anaerobic ammonium oxidation bacteria in the whole-course autotrophic nitrogen removing system that loss is easily caused, and anaerobic ammonium oxidation sludge activity is easily influenced by dissolved oxygen, are solved; the anaerobic ammonium oxidation bacteria are intercepted in the whole-course autotrophic nitrogen removing system by the immobilized anaerobic ammonium oxidation gelled pills, dissolved oxygen transmission is blocked, inhibition of the anaerobic ammonium oxidation bacteria in the immobilized anaerobic ammonium oxidation gelled pills by dissolved oxygen is not easily caused, stability is increased; and whole-course autotrophic nitrogen removing is realized.

Description

technical field [0001] The invention relates to a method for realizing whole-process autotrophic denitrification by utilizing anaerobic ammonium oxidation immobilization technology, and belongs to the technical field of sewage treatment. Background technique [0002] With the continuous occurrence of water eutrophication, nitrogen pollution has attracted people's attention, and denitrification treatment of urban sewage has become a research hotspot in sewage treatment today. The traditional biological denitrification method is mainly nitrification-denitrification denitrification, but due to its high investment and high energy consumption, it is not suitable for the treatment of high-nitrogen and low-carbon wastewater. In recent years, with the discovery of new biological denitrification pathways, the anammox biological denitrification process is gradually being developed and applied. [0003] Anaerobic ammonium oxidation (ANAMMOX) is currently known as the most simple and e...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that anammox bacteria are easy to lose in the whole process of autotrophic denitrification system, dissolved oxygen is easy to affect the activity of anammox sludge, and the operation of the whole process of autotrophic denitrification system is unstable. Anammox gel pellets were prepared by immobilized microorganism technology, and the immobilized anammox gel pellets trapped anammox bacteria in the whole autotrophic denitrification system and weakened the effect of dissolved oxygen on anammox bacteria. The impact of the system enhances the stability of the system's treatment process, making the full autotrophic denitrification system achieve stable operation after startup

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