Energy recovery-based landfill leachate autotrophic nitrogen removal method

Abstract

The invention discloses an energy recovery-based landfill leachate autotrophic nitrogen removal method belonging to the field of sewage treatment. A device mainly comprises three parts of respectively an anaerobic methane-generating reactor, a partial nitrification reactor and an anaerobic ammonia oxidation reactor, wherein landfill leachate firstly enters the anaerobic methane-generating reactor, anaerobic methanogens can convert organic matters in the landfill leachate into an energy gas methane and the energy gas methane is recovered, then the water quantity is adjusted through a middle water tank, the landfill leachate enters the partial nitrification reactor, and the partial nitrification reactor runs in a low-oxygen aeration manner, and a partial nitrification process is realized through controlling the aeration time; and finally, after the water quantity is adjusted through the middle water tank, the landfill leachate enters the anaerobic ammonia oxidation reactor, and an autotrophic nitrogen removal process of the landfill leachate is completed under the assistance of anaerobic ammonium oxidation bacteria. According to the energy recovery-based landfill leachate autotrophic nitrogen removal method, energy resources in the landfill leachate can be fully recovered, and the operation cost and the energy consumption of treating the landfill leachate are reduced.

Description

technical field [0001] The invention relates to a method for autotrophic denitrification of landfill leachate based on energy recovery, and belongs to the technical field of sewage biological treatment. Background technique [0002] High ammonia nitrogen, high organic matter concentration, and low C / N ratio are the main characteristics of landfill leachate water quality. For this wastewater quality, how to effectively remove high ammonia nitrogen under the condition of insufficient carbon source is the focus and difficulty of landfill leachate research. [0003] At present, most sewage denitrification uses traditional nitrification-denitrification as the core treatment process. For landfill leachate with high organic concentration, if nitrification-denitrification process is adopted, then in the denitrification process, heterotrophic denitrification Nitrifying bacteria use the organic matter in the landfill leachate as a carbon source for biological denitrification, thus was...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the problems of high energy consumption and poor effluent stability in the existing landfill leachate treatment, and proposes an autotrophic denitrification method for landfill leachate based on energy recovery. conversion to methane for enhanced energy recovery in landfill leachate; followed by autotrophic denitrification via nitrosation-ANAMMOX

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