期刊
WASTE MANAGEMENT
卷 105, 期 -, 页码 317-327出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2020.02.022
关键词
Landfill; Waste char; VOCs; In-situ FTIR; In-situ biodegradation
资金
- National Science Foundation for Distinguished Young Scholars [51625903]
- China Postdoctoral Science Foundation [2018M642960]
- Natural Science Foundation of Hubei Province [2019AHB073]
- National Natural Science Foundation of China [51827814, 51609241, 41772342]
- Wuhan science and technology conversion special project [2018060403011348]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2017376]
- Foundation for Innovative Research Groups of Hubei Province in China [2019CFA012]
VOCs are the major harmful pollutants released from MSW landfills, which are toxicity to human health. In order to in-situ biodegradation of VOCs released from landfill, two novel laboratory-scale biocovers, including waste-char obtained from MSW pyrolysis (WC), and sewage sludge modified the WC (SWC), are used to degradate VOCs. The removal performances of VOCs as well as the bacterial community in the WC and SWC are investigated in a simulated landfill systems with the contrast experiment of a landfill cover soil (LCS) for 60 days. Meanwhile, the adsorption-biodegradation of VOCs model compounds over the LCS, WC, and SWC are also tested in fixed-bed adsorption reactor and in-situ FTIR. The VOCs removal efficiencies by the SWC are maintained above 85% for a long-term, much higher than that of the LCS and WC. The higher removal efficiencies and long-term stability for VOCs degradation in SWC are attributed to a strongly positive synergistic between adsorption and biodegradation that the gaseous VOCs released from MSW is effectively adsorbed by the SWC due to its higher VOCs adsorption capacity, and then the adsorbed-VOCs is converted into CO(2 )and H2O by the microorganisms that consuming the adsorbed-VOCs as energy and carbon sources. Subsequently, the decrease of the adsorbed-VOCs in SWC would also promote the transformation of the gaseous VOCs into the adsorbed VOCs and accelerate the growth of microorganisms by taking the adsorbed-VOCs as the energy and carbon source, resulted in a higher adsorption rate and degradation rate for VOCs. (C) 2020 Published by Elsevier Ltd.
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