| Title: | In-situ biodegradation of volatile organic compounds in landfill by sewage sludge modified waste-char |
| Author(s): | Qin L; Xu Z; Liu L; Lu H; Wan Y; Xue Q; |
| Address: | "State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China. Electronic address: qinlinbo@wust.edu.cn. College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China; Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering, Wuhan 430071, China. Electronic address: lliu@whrsm.ac.cn. School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China; Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering, Wuhan 430071, China. Electronic address: ywan@whrsm.ac.cn. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China; Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering, Wuhan 430071, China. Electronic address: qiangx@whrsm.ac.cn" |
| DOI: | 10.1016/j.wasman.2020.02.022 |
| ISSN/ISBN: | 1879-2456 (Electronic) 0956-053X (Linking) |
| Abstract: | "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 H(2)O 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" |
| Keywords: | "Biodegradation, Environmental Humans *Refuse Disposal Sewage Soil *Volatile Organic Compounds Waste Disposal Facilities In-situ FTIR In-situ biodegradation Landfill VOCs Waste char;" |
| Notes: | "MedlineQin, Linbo Xu, Zhe Liu, Lei Lu, Haijun Wan, Yong Xue, Qiang eng 2020/02/28 Waste Manag. 2020 Mar 15; 105:317-327. doi: 10.1016/j.wasman.2020.02.022. Epub 2020 Feb 25" |
