生活垃圾填埋场黄土覆盖层的甲烷氧化能力现场测试和评估

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Abstract 50 sets of surface methane flux tests were conducted to test and analyze the methane oxidation capacity of the soil cover at different landfilling ages by using static chamber, laser methane detector and other equipment. In addition, a modified calculating method was proposed to directly evaluate the methane oxidation rate and methane oxidation fraction of the soil cover. The field test and analysis results indicated that the surface methane flux at 80% of the test sites were lower than the CFI (Carbon Farming Initiative) standard of 60g/(m²∙d); there were emission hotspots with methane flux exceeding CFI limit within 20m near the gas guide shaft. The surface methane flux of the landfill decreased from 1.13g/(m²∙d) to 0.53g/(m²∙d) during the landfilling ages from 3 to 7 years, and remained basically stable during the period of 7 to 10 years. There was a positive correlation between methane oxidation rate and methane flux at the bottom of the cover. The maximum methane oxidation rate measured in the soil cover was 63.30g/(m²∙d), and the corresponding methane flux at the bottom was 75.95g/(m²∙d). The average methane oxidation fraction of the upper loess cover at each landfilling age was over 90%.

Key words： municipal solid waste landfill landfilling age soil cover methane flux methane oxidation rate methane oxidation fraction

Received: 31 October 2022

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X705

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	Articles by authors
	ZHAN Liang-tong
	WANG Yong
	LIU Kai
	LAN Ji-wu
	FENG Song
	WANG Jun-ming
	LIN Yi-fan

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ZHAN Liang-tong,WANG Yong,LIU Kai等. Field test and evaluation of methane oxidation capacity of loess cover in municipal solid waste landfill[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 3150-3157.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I6/3150

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