title: Stimulation of methanogenesis in anaerobic digesters treating leachate from a municipal solid waste incineration plant with carbon cloth.
abstract: Bio-methanogenic digestion of incineration leachate is hindered by high OLRs, which can lead to build-up of VFAs, drops in pH and ultimately in reactor souring. It was hypothesized that incorporation of carbon cloth into reactors treating leachate would promote DIET and enhance reactor performance. To examine this possibility, carbon cloth was added to laboratory-scale UASB reactors that were fed incineration leachate. As expected, the carbon-cloth amended reactor could operate stably with a 34.2% higher OLR than the control (49.4 vs 36.8kgCOD/(m3d)). Microbial community analysis showed that bacteria capable of extracellular electron transfer and methanogens known to participate in DIET were enriched on the carbon cloth surface, and conductivity of sludge from the carbon cloth amended reactor was almost twofold higher than sludge from the control (9.77 vs 5.47μS/cm), suggesting that microorganisms in the experimental reactor may have been expressing electrically conductive filaments.
authors.affiliation: Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science & Engineering, Beijing Forestry University, 35 Tsinghua East Road, Beijing 100083, China.
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Lei
authors.affiliation: Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science & Engineering, Beijing Forestry University, 35 Tsinghua East Road, Beijing 100083, China.
authors.forename: Dezhi
authors.initials: D
authors.lastname: Sun
authors.affiliation: Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science & Engineering, Beijing Forestry University, 35 Tsinghua East Road, Beijing 100083, China. Electronic address: yandang@microbio.umass.edu.
authors.forename: Yan
authors.initials: Y
authors.lastname: Dang
authors.affiliation: Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science & Engineering, Beijing Forestry University, 35 Tsinghua East Road, Beijing 100083, China.
authors.forename: Huimin
authors.initials: H
authors.lastname: Chen
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian University of Technology), Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian University of Technology), Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Yaobin
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Physical and Biological Sciences, Western New England University, 1215 Wilbraham Rd, Springfield, MA 01119, United States.
authors.forename: Dawn E
authors.initials: DE
authors.lastname: Holmes
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism; D001483:Base Sequence; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000737:chemistry*; D004553:Electric Conductivity; D005232:Fatty Acids, Volatile / Q000378:metabolism; D017745:Incineration; D008697:Methane / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012722:Sewage / Q000382:microbiology; D062611:Solid Waste; D013784:Textiles; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D005232:Fatty Acids, Volatile; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D062611:Solid Waste; D014874:Water Pollutants, Chemical; D002244:Carbon; D008697:Methane
keywords: Carbon cloth; Direct interspecies electron transfer; Extracellular electron transfer; Incineration leachate; Methanogenesis