Short-cut nitrification-anaerobic ammonia oxidation two-stage sewage treatment device and process

Abstract

The invention discloses a short-cut nitrification-anaerobic ammonia oxidation two-stage sewage treatment device that comprises a chemical enhanced primary treatment reaction device, a short-cut nitrification MBBR reactor and an anaerobic ammonia oxidation UASB reactor; the municipal domestic sewage subjected to primary treatment enters a chemical enhanced primary treatment system to be treated, somost organic matters and total phosphorus are removed; then, stable short-cut nitrification is performed through the MBBR controlled by the automatic control system, so about 50% of NH4 < + >-N is converted into NO2 <->-N, most of organic matters in the sewage are removed at the same time, an anaerobic ammonia oxidation reaction is carried out through an anaerobic ammonia oxidation UASB reactor,NO2 <->-N is used as an electron acceptor to convert NH4 < + >-N into nitrogen under the action of anaerobic ammonia oxidation bacteria, and the purpose of deep denitrification is achieved. Accordingto the two-stage sewage treatment device and process provided by the invention, a large amount of energy can be saved in the whole process flow, efficient denitrification of urban domestic sewage is realized, and a low-consumption effective process mode is provided for urban domestic sewage treatment.

Description

technical field [0001] The invention relates to a short-range nitrification-anammox two-stage sewage treatment device and process, which belongs to the technical field of sewage treatment and is suitable for the mainstream treatment system of urban domestic sewage. Background technique [0002] With the continuous improvement of the speed of urban development in my country, the problem of water pollution caused by the substandard discharge of urban domestic sewage continues to intensify. The nitrification-denitrification biological denitrification process used in the traditional urban domestic sewage treatment process requires a large amount of additional carbon sources, which has disadvantages such as high energy consumption and inconvenient operation, and it is difficult to fully meet the development needs of a resource-saving society. The new biological denitrification technology represented by oxygen ammonium oxidation has become a research hotspot in the field of intern...

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Problems solved by technology

[0004] Objective: In order to overcome the problems that short-range nitrification is difficult to control stably when anaerobic ammonium oxidation technology is incorporated into the mainstream treatment process of urban domestic sewage, and the high organic matter content in urban domestic sewage inhibits anammox reaction, the present invention provides a short-range nitrification - Anaerobic ammonium oxidation two-stage sewage treatment device and process, the entire process can save a lot of energy, realize the efficient denitrification of urban domestic sewage, and provide a low-consumption and effective process mode for urban domestic sewage treatment

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