| Title: | Composition and profiles of volatile organic compounds during waste decomposition by the anaerobic bacteria purified from landfill |
| Author(s): | Shao Y; Xia M; Liu J; Liu X; Li Z; |
| Address: | "College of Environmental Science and Engineering, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, Peking University, Beijing 100871, PR China. College of Environmental Science and Engineering, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, Peking University, Beijing 100871, PR China; College of International Education, Beijing University of Agriculture, Beijing 102206, PR China. College of Environmental Science and Engineering, State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems, Peking University, Beijing 100871, PR China. Electronic address: lizhenshan@pku.edu.cn" |
| DOI: | 10.1016/j.wasman.2021.03.038 |
| ISSN/ISBN: | 1879-2456 (Electronic) 0956-053X (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) become concerned pollutants in landfill gases, and their composition and concentration varied significantly during waste decomposition. Many environmental factors are known to affect VOC emissions, while the effect of indigenous bacteria in wastes on VOC production remains elusive. In this study, a simplified anaerobic degradation experiment, with the single substrate and the purified bacteria from a landfill, was set up to measure the degradation process and the dynamic changes of VOCs. The experiment excluded the abiotic factors for VOC variation. The two isolated bacteria, identified as Sporanaerobacter acetigenes and Clostridium sporogenes, could anaerobically ferment amino acids by Stickland reaction. They produced 51 and 57 species of VOCs in the experiment, respectively. The concentration changes of VOCs over bacterial growth and fermentation were clustered into four types by principal component analysis: three profiles were regular, similar to the variation of nitrate, hydrogen sulfide, and the major fermentation products (carbon dioxide, ammonium, and volatile organic acids), respectively; while one profile was unique to any degradation indicator. The various concentration profiles indicated different origins for VOCs, possibly from the extracellular environment, fermentation, and secondary reactions. The findings provide insights into the understanding of VOC diversity and variability during waste decomposition" |
| Keywords: | "*Air Pollutants Bacteria, Anaerobic Clostridium Firmicutes *Volatile Organic Compounds/analysis Waste Disposal Facilities Anaerobic bacteria Concentration variation Landfill gas VOCs Waste degradation;" |
| Notes: | "MedlineShao, Yan Xia, Mengjing Liu, Jun Liu, Xinyi Li, Zhenshan eng 2021/04/11 Waste Manag. 2021 May 1; 126:466-475. doi: 10.1016/j.wasman.2021.03.038. Epub 2021 Apr 7" |
