摘要
污水处理过程中会产生大量的温室气体,其中包括一氧化二氮(N2O),而N2O的增加会对气候变化和生态环境产生显著影响.本文综述了在硝化作用、反硝化作用、同步硝化反硝化、反硝化除磷、好氧颗粒污泥和厌氧氨氧化过程中产生N2O的机理.同时,总结了影响N2O释放的因素以及减少N2O排放的方法,并对未来污水处理中N2O减排的研究方向进行了展望.
Abstract
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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