PMID- 28557303 OWN - NLM STAT- MEDLINE DCOM- 20181112 LR - 20210109 IS - 1751-7915 (Electronic) IS - 1751-7915 (Linking) VI - 11 IP - 1 DP - 2018 Jan TI - Simultaneous fermentation of cellulose and current production with an enriched mixed culture of thermophilic bacteria in a microbial electrolysis cell. PG - 63-73 LID - 10.1111/1751-7915.12733 [doi] AB - An enriched mixed culture of thermophilic (60 degrees C) bacteria was assembled for the purpose of using cellulose to produce current in thermophilic microbial electrolysis cells (MECs). Cellulose was fermented into sugars and acids before being consumed by anode-respiring bacteria (ARB) for current production. Current densities (j) were sustained at 6.5 +/- 0.2 A m(-2) in duplicate reactors with a coulombic efficiency (CE) of 84 +/- 0.3%, a coulombic recovery (CR) of 54 +/- 11% and without production of CH(4) . Low-scan rate cyclic voltammetry (LSCV) revealed a mid-point potential (E(ka) ) of -0.17 V versus SHE. Pyrosequencing analysis of the V4 hypervariable region of 16S rDNA and scanning electron microscopy present an enriched thermophilic microbial community consisting mainly of the phylum Firmicutes with the Thermoanaerobacter (46 +/- 13%) and Thermincola (28 +/- 14%) genera occupying the biofilm anode in high relative abundance and Tepidmicrobium (38 +/- 6%) and Moorella (11 +/- 8%) genera present in high relative abundance in the bulk medium. The Thermoanaerobacter (15 +/- 16%) and Brevibacillus (21 +/- 30%) genera were also present in the bulk medium; however, their relative abundance varied by reactor. This study indicates that thermophilic consortia can obtain high CE and CR, while sustaining high current densities from cellulose in MECs. CI - (c) 2017 The Authors. Microbial Biotechnology published by John Wiley & Sons Ltd and Society for Applied Microbiology. FAU - Lusk, Bradley G AU - Lusk BG AD - Biodesign Swette Center for Environmental Biotechnology, Arizona State University, P.O. Box 875701, Tempe, AZ, 85287-5701, USA. AD - #ScienceTheEarth, Mesa, AZ, 85201, USA. FAU - Colin, Alexandra AU - Colin A AD - Ecole Normale Superieure, 45, rue d'Ulm, 75230, Paris Cedex 05, France. FAU - Parameswaran, Prathap AU - Parameswaran P AD - Department of Civil Engineering, Kansas State University, 2123 Fiedler Hall, Manhattan, KS, 66502, USA. FAU - Rittmann, Bruce E AU - Rittmann BE AD - Biodesign Swette Center for Environmental Biotechnology, Arizona State University, P.O. Box 875701, Tempe, AZ, 85287-5701, USA. AD - School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA. FAU - Torres, Cesar I AU - Torres CI AD - Biodesign Swette Center for Environmental Biotechnology, Arizona State University, P.O. Box 875701, Tempe, AZ, 85287-5701, USA. AD - School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20170529 PL - United States TA - Microb Biotechnol JT - Microbial biotechnology JID - 101316335 RN - 0 (DNA, Bacterial) RN - 0 (DNA, Ribosomal) RN - 0 (RNA, Ribosomal, 16S) RN - 9004-34-6 (Cellulose) SB - IM MH - Bacteria/classification/genetics/*metabolism MH - *Bioelectric Energy Sources MH - Bioreactors/microbiology MH - Cellulose/*metabolism MH - DNA, Bacterial/chemistry/genetics MH - DNA, Ribosomal/chemistry/genetics MH - *Electricity MH - Fermentation MH - *Microbial Consortia MH - Microscopy, Electron, Scanning MH - Phylogeny MH - RNA, Ribosomal, 16S/genetics MH - Sequence Analysis, DNA PMC - PMC5743814 EDAT- 2017/05/31 06:00 MHDA- 2018/11/13 06:00 PMCR- 2017/05/29 CRDT- 2017/05/31 06:00 PHST- 2016/11/11 00:00 [received] PHST- 2017/04/26 00:00 [revised] PHST- 2017/04/27 00:00 [accepted] PHST- 2017/05/31 06:00 [pubmed] PHST- 2018/11/13 06:00 [medline] PHST- 2017/05/31 06:00 [entrez] PHST- 2017/05/29 00:00 [pmc-release] AID - MBT212733 [pii] AID - 10.1111/1751-7915.12733 [doi] PST - ppublish SO - Microb Biotechnol. 2018 Jan;11(1):63-73. doi: 10.1111/1751-7915.12733. Epub 2017 May 29.