Enhancing anaerobic digestion of complex organic waste with carbon-based conductive materials.
The aim of this work was to study the methanogenic metabolism of dog food, a food waste surrogate, in laboratory-scale reactors with different carbon-based conductive materials. Carbon cloth, carbon felt, and granular activated carbon all permitted higher organic loading rates and promoted faster recovery of soured reactors than the control reactors. Microbial community analysis revealed that specific and substantial enrichments of Sporanaerobacter and Methanosarcina were present on the carbon cloth surface. These results, and the known ability of Sporanaerobacter species to transfer electrons to elemental sulfur, suggest that Sporanaerobacter species can participate in direct interspecies electron transfer with Methanosarcina species when carbon cloth is available as an electron transfer mediator.
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA; Beijing Key Laboratory for Source Control Technology of Water Pollution, College of Environmental Science & Engineering, Beijing Forestry University, 35 Tsinghua East Road, Beijing 100083, China. Electronic address: dangyan.p@gmail.com.
Yan
Y
Dang
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA; Department of Physical and Biological Sciences, Western New England University, 1215 Wilbraham Rd, Springfield, MA 01119, USA.
Dawn E
DE
Holmes
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA; 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.
Zhiqiang
Z
Zhao
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA.
Trevor L
TL
Woodard
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA; 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.
Yaobin
Y
Zhang
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA; Beijing Key Laboratory for Source Control Technology of Water Pollution, College of Environmental Science & Engineering, Beijing Forestry University, 35 Tsinghua East Road, Beijing 100083, China.
Dezhi
D
Sun
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA.
Li-Ying
LY
Wang
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA.
Kelly P
KP
Nevin
Department of Microbiology, University of Massachusetts Amherst, Morril IV N Science Center, Amherst, MA 01003, USA.
Derek R
DR
Lovley
D000693:Anaerobiosis; D000818:Animals; D001419:Bacteria / Q000378:metabolism; D019149:Bioreactors; D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D002606:Charcoal / Q000737:chemistry; D004285:Dogs; D004553:Electric Conductivity; D005232:Fatty Acids, Volatile / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000096:biosynthesis; D009930:Organic Chemicals / Q000032:analysis*; D014866:Waste Products
D000077482:Carbon Fiber; D005232:Fatty Acids, Volatile; D009930:Organic Chemicals; D014866:Waste Products; D002606:Charcoal; D002244:Carbon; D008697:Methane
Anaerobic digestion; Carbon-based conductive material; Direct interspecies electron transfer; Methanogenesis; Organic wastes