System and method for realizing partial anaerobic ammonia oxidation deep nitrogen and phosphorus removal through biological membrane circulation alternation in mainstream and sidestream regions of urban sewage treatment plant

Abstract

The invention provides a system and a method for realizing partial anaerobic ammonia oxidation deep nitrogen and phosphorus removal through biological membrane circulation alternation in mainstream and sidestream regions of an urban sewage treatment plant. The system comprises three main composition units, namely a main flow area (a), a deep treatment area (b) and a side flow area (c), wherein deep nitrogen and phosphorus removal of the whole system is realized through biological membrane circulation alternation, in the main flow area (a), an anaerobic/anoxic area is mainly used for heterotrophic denitrification nitrogen removal and short-cut denitrification/anaerobic ammonia oxidation autotrophic nitrogen removal, and an aerobic area is mainly used for removing organic matters, performingaerobic phosphorus absorption and completing nitration reaction, in a denitrification fluidized bed (8) in the deep treatment area (b), deep treatment is performed on a mixed solution of effluent andraw water in the main flow area to realize heterotrophic denitrification and short-cut denitrification/anaerobic ammonia oxidation autotrophic nitrogen removal, and a high-ammonia-nitrogen anaerobicammonia oxidation denitrification area (7) in the side flow area (c) is used for enriching anaerobic ammonia oxidizing bacteria based on a biological membrane, so that autotrophic denitrification of the side flow high-ammonia-nitrogen wastewater is realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment by activated sludge method and biofilm method, and is applicable to the technical fields of sewage treatment such as new sewage treatment plants and upgrading of existing sewage treatment plants, treatment of municipal sewage and industrial waste water, and the like. Background technique [0002] The up-to-standard discharge of urban sewage has been the focus of attention in recent years, especially the removal of nitrogen. At present, many sewage treatment plants still face the status or risk that the total nitrogen discharge cannot meet the standard. The reason is that the carbon-to-nitrogen ratio of most wastewater collected to municipal sewage treatment plants is relatively low, which limits the denitrification load of the traditional nitrification and denitrification process. In order to meet the increasingly stringent emission requirements, the method of adding an external carbon s...

AI Technical Summary

Problems solved by technology

At present, although more and more experimental evidence supports the feasibility of the anammox technology for urban sewage, the bottleneck problem of the direct treatment of actual urban sewage by its process still needs to be broken through, including the uncontrollable growth of nitrite oxidizing bacteria, anaerobic Unstable persistence of ammonium oxidizing bacteria, inhibitory effect of low temperature, etc.

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