An integrated biological treatment process for short-cut nitrification and anammox simultaneous removal of phosphorus under intermittent aeration mode

Abstract

The invention relates to an integrated biological treatment process for simultaneously performing short-cut nitrification anaerobic ammonium oxidation and phosphorus removal in an intermittent aeration mode, belonging to the technical field of biological sewage treatment. The process is implemented in an integrated reactor for simultaneously realizing short-cut nitrification anaerobic ammonium oxidation and phosphorus removal. Three microbial florae, i.e., ammonia oxidizing bacteria (AOB), phosphorus accumulating organisms (PAOs) and anaerobic ammonium oxidation bacteria mainly exist in the integrated reactor, wherein the AOB and the PAOs exist in a floc form, and the anaerobic ammonium oxidation bacteria exists in a granular form. The municipal domestic sewage directly enters the integrated reactor without being subjected to decarburization pretreatment; the integrated reactor effectively inhibits the activity of nitrite oxidizing bacteria by means of an intermittent aeration operation mode, and can provide a carbon source and an electron donor for strengthening biological phosphorus removal in a process of autotrophic nitrogen removal of short-cut nitrification anaerobic ammoniumoxidation so as to achieve the zero addition of an additional carbon source. The integrated reactor for simultaneously realizing short-cut nitrification anaerobic ammonium oxidation and phosphorus removal can effectively retain anaerobic ammonium oxidizing bacteria particles and simultaneously washing out fine phosphate-rich floc sludge by using a screening method in a draining process.

Description

technical field [0001] The invention relates to an integrated biological treatment process for short-range nitrification, anaerobic ammonium oxidation and phosphorus removal under intermittent aeration mode, and belongs to the technical field of sewage biological treatment. Background technique [0002] With the continuous acceleration of urbanization and the gradual improvement of environmental protection requirements, the number of urban sewage treatment plants is increasing, and the sewage treatment rate is also increasing. Urban domestic sewage treatment mainly faces obstacles such as low ammonia nitrogen, low energy, low temperature, and large water volume, and its treatment difficulty is far more than that of industrial wastewater. Sewage treatment is an energy-intensive industry. On the one hand, high energy consumption leads to an increase in the cost of sewage treatment, which exacerbates the current energy crisis in my country to a certain extent. On the other hand...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the existing problems of low COD, low ammonia nitrogen urban domestic sewage, and the stability of effluent water quality is not easy to reach the standard, etc., and propose an integrated biological treatment of short-range nitrification anammox and phosphorus removal under intermittent aeration mode This process makes full use of COD and ammonia nitrogen in the original domestic sewage, and adopts intermittent aeration mode to realize short-range nitrification anammox and phosphorus removal at the same time

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