Research Progress of Reduction of Nitrous Oxide Emission Methods in Wastewater Treatment Plant
During the sewage treatment process,a large amount of greenhouse gases are generated,including nitrous oxide(N2O),and the increase of N2O will have a significant impact on climate change and the ecological environment.This article summarizes the mechanisms of N2O production in nitrification,denitrification,simultaneous nitrification denitrification,denitrifying phosphorus removal,aerobic granular sludge,and anaerobic ammonia oxidation processes.At the same time,factors affecting N2O release and methods for reducing N2O emissions were summarized,and future research directions for N2O emission reduction in wastewater treatment were discussed.
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