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Municipal solid waste characterization and its assessment for potential methane generation: A case study

甲烷 城市固体废物 填埋气 环境科学 废弃物 废物管理 环境工程 温室气体 工程类 化学 生态学 生物 有机化学
作者
Suman Mor,Khaiwal Ravindra,Alex De Visscher,R.P. Dahiya,A. Chandra
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:371 (1-3): 1-10 被引量:255
标识
DOI:10.1016/j.scitotenv.2006.04.014
摘要

There has been a significant increase in municipal solid waste (MSW) generation in India during the last few decades and its management has become a major issue because the poor waste management practices affect the health and amenity of the cities. In the present study, various physico-chemical parameters of the MSW were analyzed to characterize the waste dumped at Gazipur landfill site in Delhi, India, which shows that it contains a high fraction of degradable organic components. The decomposition of organic components produces methane, a significant contributor to global warming. Based on the waste composition, waste age and the total amount dumped, a first-order decay model (FOD) was applied to estimate the methane generation potential of the Gazipur landfill site, which yields an estimate of 15.3 Gg/year. This value accounts to about 1-3% of existing Indian landfill methane emission estimates. Based on the investigation of Gazipur landfill, we estimate Indian landfill methane emissions at 1.25 Tg/year or 1.68 Tg/year of methane generation potential. These values are within the range of existing estimates. A comparison of FOD with a recently proposed triangular model was also performed and it shows that both models can be used for the estimation of methane generation. However, the decrease of the emission after closure is more gradual in the case of the first-order model, leading to larger gas production predictions after more than 10 years of closure. The regional and global implications of national landfill methane emission are also discussed.
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