生物炭填埋场土壤覆盖层的甲烷减排性能和生物特征

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Abstract The components of cover soil are closely associated with the methane bio-oxident potential efficiency. Therefore, a landfill cover soil amended with biochar (RB) with a conventional cover soil(RS) as a control, was designed to investigate the influences on the CH₄ mitigation potential as well as the microbial characteristics in this work. The results indicated that the addition of the biochar into the soil enabled to facilitate the CH₄ mitigation potential. Notably, about 99.00% of the methane in the inlet of RB was removed on the 81th day, while the methane reduction rate of RS reached 99.16% on the 95th day. Furthermore, the methane-oxidizing bacteria (MOB), Methylocaldum was observed dominantly in all the layers of the RS, while Methylobacter was dominant in the upper and middle layers of RB and Methylocaldum in the lower layer. The corresponding abundances of the total MOB were 9.05%, 5.95% and 42.12% in the upper, middle and lower layers of RS, respectively, and 50.81%, 42.67% and 31.41% in the RB, respectively. In brief, biochar amended in the bio-cover undoubtedly improve the methane emission reduction performance through the acceleration of the growth of MOB and optimizing the distribution of bacteria in the landfill cover layer.

Key words： landfill cover soil biochar methane emission reduction biological characteristics

Received: 15 May 2020

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X703

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	QIN Yong-li
	SUN Xiao-jie
	WANG Chun-lian
	WU Bei-bei
	XUE Chen-nan
	ZHANG Hong-xia

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QIN Yong-li,SUN Xiao-jie,WANG Chun-lian等. Methane emission reduction and biological characteristics induced by the landfill cover soil amended with biochar[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 254-262.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I1/254

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