Anaerobic ammonia oxidized coupled heterotrophic denitrifying denitrification method

Abstract

The invention relates to an anaerobic ammonia oxidized coupled heterotrophic denitrifying denitrification method and belongs to the technical field of biological sewage treatment. The method includes adopting anaerobic ammonia oxidized granule sludge as the inoculated sludge; manually distributing water to add ammonium chloride, sodium nitrite, and phenol which is taken as organic matter, realizing enrichment culture of anaerobic ammonium oxidized bacteria and heterotrophic denitrifying bacteria, determining competitive and cooperative relations of the anaerobic ammonium oxidized bacteria and heterotrophic denitrifying bacteria, and realizing the enrichment culture of mixed flora of the anaerobic ammonium oxidized bacteria and heterotrophic denitrifying bacteria after a period of time.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to an anaerobic ammonium oxidation coupled heterotrophic denitrification method for denitrification. Background technique [0002] Existing sewage treatment plants mostly adopt the traditional biological nitrification and denitrification denitrification process. In the nitrification stage, aeration is required to convert ammonia nitrogen into nitrate nitrogen. In the denitrification stage, an additional carbon source is required to convert nitrate nitrogen into nitrogen gas. , Dosing carbon sources will undoubtedly increase the cost of wastewater treatment, and the treatment efficiency of traditional denitrification process is not high. Therefore, there is an urgent need for a highly efficient and energy-saving wastewater denitrification process. In 1995, the Deft University of the Netherlands reported the existence of anammox bacteria, and then a ne...

AI Technical Summary

Problems solved by technology

However, the anaerobic ammonium oxidation process will produce a certain amount of nitrate nitrogen, and the actual nitrogen-containing wastewater generally contains organic pollutants. As we all know, nitrate nitrogen is the electron acceptor of denitrification, and organic matter is the electron donor of denitrification. Therefore, the research on anammox coupled with heterotrophic denitrification has become a research hotspot in recent years.

However, nitrite nitrogen is also an electron acceptor for denitrification, and the presence of nitrite nitrogen may cause competition between denitrifying bacteria and anammox bacteria

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