Device and method for treating mainstream low-carbon-nitrogen-ratio domestic sewage through two-stage whole-process ammoxidation-short-range denitrification anaerobic ammoxidation

Abstract

The invention discloses a device and a method for treating mainstream low-carbon-nitrogen-ratio domestic sewage through two-stage whole-process ammoxidation-short-range denitrification anaerobic ammoxidation. The device comprises an urban sewage raw water tank, a whole-course ammoxidation reactor, a middle water tank and a short-cut denitrification anaerobic ammoxidation reactor. According to the method, a part of urban domestic sewage firstly enters the whole-course ammonia oxidation reactor, ammonia nitrogen in the part of sewage is directly oxidized into nitrate nitrogen by whole-course ammonia oxidation bacteria under the aeration condition, then the part of sewage and the other part of urban domestic sewage raw water are mixed in the middle water tank and then enter the short-cut denitrification anaerobic ammonia oxidation reactor, and the short-cut denitrification anaerobic ammonia oxidation reactor enters the short-cut denitrification anaerobic ammonia oxidation reactor. And nitrate nitrogen and ammonia nitrogen are completely removed. The method can stably realize deep denitrification of the low-carbon-nitrogen-ratio urban domestic sewage.

Description

technical field [0001] The invention relates to a two-stage whole-process ammonium oxidation-short-range denitrification anaerobic ammonium oxidation device for treating mainstream low-carbon-to-nitrogen ratio domestic sewage, which belongs to the field of sewage biological treatment. Background technique [0002] In recent years, the development of industrial and agricultural technology and urbanization has accelerated, the population has continued to increase, and the water pollution problems caused by the gradual transformation of human life style and industry and agriculture have become more and more serious threats to the safety of my country's water resources and the environment. Among them, the eutrophication of water bodies caused by excessive discharge of nitrogen and phosphorus pollutants is particularly prominent. At present, biological methods are the main method for nitrogen removal in sewage treatment plants, and traditional nitrification and denitrification te...

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Problems solved by technology

[0003] At present, the bottleneck in the application of ANAMMOX technology is mainly the stable source of nitrite nitrogen and the appropriate ratio of nitrite to ammonia nitrogen in the influent (1~1.32)

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