Estimation of Methane Emissions from Municipal Solid Waste Landfills in China Based on Point Emission Sources

作     者：CAI Bo-Feng LIU Jian-Guo GAO Qing-Xian NIE Xiao-Qin CAO Dong LIU Lan-Cui ZHOU Ying ZHANG Zhan-Sheng 

作者机构：Chinese Academy for Environmental Planning School of Environment Tsinghua University Chinese Research Academy of Environmental Sciences China Urban Construction Design and Research Institute 

出 版 物：《Advances in Climate Change Research》 (气候变化研究进展（英文版）)

年 卷 期：2014年第5卷第2期

页      面：81-91页

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：funded by the Project Study on Key Issues of China City Carbon Emission Inventory (No. 41101500) supported by National Natural Science Foundation of China 

主　　题：municipal solid waste landfill CH4 emissions point emission sources 

摘      要：The methane(CH4) emissions from municipal solid waste(MSW) landfills in China in 2007 were estimated based on database of the three-dimensional emission factors matrix and point sources, by an IPCC recommended FOD(firstorder decay) model. The location, capacity and age of landfills constitute the three dimensions of the emission factors matrix, which were obtained by laboratory analysis and in situ investigation. Key parameters such as waste composition,degradable organic carbon ratio, CH4 correction factor, oxidation factor and recovery rate, were carefully analyzed in terms of these three dimensions. The point sources database consists of 2,107 MSW landfills in cities and towns of China in 2007. The results show that the CH4 emissions from MSW landfills were 1.186 Mt in 2007. Compared with the CH4 emissions of 2.20 Mt in 2005, the significant discrepancy mainly comes from statistical data of landfills, e.g., number of landfills and amount of waste disposed in landfills. CH4 emissions were lower than 700 t for most of the landfills, whereas there were 279 landfills with emissions larger than 1,000 t, and only 10 landfills with emissions larger than 10,000 *** province ranks the largest emitter with 98,700 t while Tibet is the smallest emitter with 2,100 t. In general,the emissions from eastern provinces, such as Jiangsu, Guangdong and Zhejiang, were larger than those from western provinces, such as Ningxia, Tibet and Qinghai.