Device and method for deeply denitrifying landfill leachate based on in-situ induction of short-cut denitrification coupled anaerobic ammonia oxidation of sludge fermentation liquor

Abstract

The invention discloses a device and a method for deeply denitrifying landfill leachate based on in-situ induction of short-cut denitrification coupled anaerobic ammonia oxidation of sludge fermentation liquor, and belongs to the technical field of biological denitrification of wastewater with low carbon-nitrogen ratio and high ammonia-nitrogen ratio. In the device, a leachate raw water tank is sequentially connected with a short-cut nitrification SBR reactor, a middle water tank, an anaerobic ammonia oxidation SBR reactor and a water outlet tank, a sludge inlet storage tank is sequentially connected with a sludge fermentation tank and a sludge discharge storage tank, and a supernate discharge pipe of the sludge discharge storage tank communicates with the anaerobic ammonia oxidation SBR reactor. The method is suitable for fermentation reduction of residual sludge generated by a sewage treatment plant, realizes deep denitrification of the landfill leachate by in-situ domestication and short-cut denitrification of the sludge fermentation liquid in the anaerobic ammonia oxidation section, has the advantages of advanced process and obvious energy-saving and consumption-reducing advantages, is convenient for practical application, and provides conditions for combined treatment of the residual sludge and the landfill leachate.

Description

technical field [0001] The invention relates to a device and method for deep denitrification of landfill leachate based on in-situ induced short-range denitrification coupled with anaerobic ammonium oxidation of sludge fermentation liquid, which belongs to the joint treatment of biological denitrification of waste water with low carbon-to-nitrogen ratio and high ammonia-nitrogen and excess sludge field. It is suitable for fermenting and reducing the excess sludge produced in sewage treatment plants. At the same time, the sludge fermentation liquid is used to domesticate short-term denitrification in situ in the anaerobic ammonium oxidation section, so as to realize the deep denitrification of landfill leachate. Background technique [0002] In recent years, with the continuous improvement of people's living standards and the continuous increase of urban solid waste production, in the process of solving environmental pollution problems, the problem of excess sludge generated ...

AI Technical Summary

Problems solved by technology

Using a single treatment technology often cannot treat landfill leachate cost-effectively, and it is necessary to combine processes with different characteristics

The severe lack of organic carbon sources is the barrier that cannot improve the denitrification efficiency of late leachate, and the addition of organic carbon sources will greatly increase the denitrification cost of landfill leachate

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