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2018年 第12卷 第1期

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《环境科学与工程前沿（英文）》 >> 2018年 第12卷 第1期 doi: 10.1007/s11783-018-1021-3

Enzymatic nitrous oxide emissions from wastewatertreatment

. Department of Civil & EnvironmentalEngineering, The Hong Kong University of Science and Technology, HongKong 999077, China.. State Key Laboratory of PollutionControl and Resources Reuse, College of Environmental Science andEngineering, Tongji University, Shanghai 200092, China.. Institute for Advanced Study, TheHong Kong University of Science and Technology, Hong Kong 999077,China.. Hong Kong Branch of the Chinese NationalEngineering Research Center for Control & Treatment of Heavy MetalPollution, The Hong Kong University of Science and Technology, HongKong 999077, China.. Wastewater Treatment Laboratory, FYTGraduate School, The Hong Kong University of Science and Technology,Guangzhou 511458, China

发布日期： 2018-01-05
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Nitrous oxide (N O), a potent greenhousegas, is emitted during nitrogen removal in wastewater treatment, significantlycontributing to greenhouse effect. Nitrogen removal generally involvesnitrification and denitrification catalyzed by specific enzymes. N O production and consumption vary considerably in responseto specific enzyme-catalyzed nitrogen imbalances, but the mechanismsare not yet completely understood. Studying the regulation of relatedenzymes’ activity is essential to minimize N O emissions during wastewater treatment. This paper aims to reviewthe poorly understood related enzymes that most commonly involvedin producing and consuming N O in terms oftheir nature, structure and catalytic mechanisms. The pathways ofN O emission during wastewater treatment arebriefly introduced. The key environmental factors influencing N O emission through regulatory enzymes are summarizedand the enzyme-based mechanisms are revealed. Several enzyme-basedtechniques for mitigating N O emissions directlyor indirectly are proposed. Finally, areas for further research onN O release during wastewater treatment arediscussed.

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