A method for methane production and high-efficiency deep denitrification of urban sewage

Abstract

The invention discloses a method for methane production and high-efficiency deep denitrification of urban sewage. The invention belongs to the technical field of sewage biological treatment. The urban sewage first enters the anaerobic membrane bioreactor, and the granular sludge converts the organic matter in the water into methane, and the sludge and dissolved methane are intercepted through the membrane module, which improves the collection rate of methane gas and reduces the release of dissolved methane in the effluent as a greenhouse gas; then The effluent and the nitrification liquid returned from the nitrification reactor enter the short-range denitrification coupled anaerobic ammonia oxidation reactor, and the granular sludge reduces nitrate nitrogen to nitrite nitrogen, and simultaneously converts nitrite nitrogen and part of ammonia nitrogen into nitrogen gas ; Then the effluent enters the short-range nitrification anammox reactor, and the granular sludge converts part of the ammonia nitrogen into nitrite nitrogen, and then converts the nitrite nitrogen and part of the ammonia nitrogen into nitrogen; finally enters the nitrification reactor, and the granular sludge converts the sub Nitrate nitrogen and ammonia nitrogen are oxidized to nitrate nitrogen, and finally achieve the purpose of deep denitrification.

Description

Technical field[0001]The present invention relates to a method of urban sewage methane and high-efficiency depth nitrogen, belonging to the field of sewage biological treatment.Background technique[0002]In the face of increasingly stringent water production standards, urban sewage plant biodean nitrogen nitrogen is often facing high energy consumption, high operating cost, and has a large problem. At present, most urban sewage plants use traditional biological nitrification and denitrifying techniques, and additional carbon sources are required during denitrification.[0003]Anaerobic ammonia oxidation reaction and short-range denitrification findings provide a basis for achieving low-energy efficient depth nitrogen. The anaerobic ammonia oxidation reaction belongs to the biological self-reinteitating nitrogen, and only the partial ammonia nitrogen is oxidized to nitrid nitrogen as an electron receptor, the remaining ammonia nitrogen is used as an electron donor, and the nitrogen-cont...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for methane production and high-efficiency deep denitrification of urban sewage for the problems of high energy consumption, high operating cost and low denitrification efficiency of urban sewage biological denitrification

Images