HAOXiao-di,SUNQun,LIJi,et al.Affecting Factors and Estimating Methods of Methane Produced in Sewers[J].China Water & Wastewater,2022,38(20):1-7.
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Affecting Factors and Estimating Methods of Methane Produced in Sewers

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第20期 Page: 1-7 Column: Date of publication: 2022-10-17
Author(s):
HAO　Xiao-di;  SUN　Qun;  LI　Ji;  YUAN　Tu-gui
（Sino-Dutch R & D Centre for Future Wastewater Treatment Technologies， Key Laboratory of Urban Stormwater System and Water Environment ， Beijing University of Civil Engineering and Architecture， Beijing 100044， China）
Keywords:
sewers;  methane (CH4);  organics;  anaerobic environment;  model prediction;  source control
Abstract:
Methane (CH4) released from sewers is a natural phenomenon, which is an invisible carbon emission source that is easily neglected. Chemical oxygen demand (COD) in wastewater and the anaerobic environment in sewers favor the growth of methanogenic archaea (MA) ，and will lead to the inevitable CH4 production. Simple coefficient estimation and model prediction are methods for quantitative estimation of CH4 production in sewers. The CH4 emission from sewers in China is around 20 million tCO2-eq/a taking these estimation methods, which is nearly half of the total carbon emissions from wastewater treatment plants (39.85 million tCO2-eq/a) in China. Under the circumstance, CH4 released from sewers should not be underestimated and neglected. The technical measures for controlling CH4 generation and release in sewers include source control (adding ferrate, free ammonia and nitrous as well as controlling pH), process management (pipeline design and operation), end-of-pipe treatment (off-gas treatment), etc.
Last Update: 2022-10-17