期刊
BIORESOURCE TECHNOLOGY
卷 259, 期 -, 页码 304-311出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.03.053
关键词
Hyperthermophilic exoelectrogens; Deep-sea hydrothermal vent; Microbial electrolysis cell; External electron transfer
资金
- National Interdisciplinary Program of CNRS Initiative structurante EC2CO (MICROBIEN)
While more and more investigations are done to study hyperthermophilic exoelectrogenic communities from environments, none have been performed yet on deep-sea hydrothermal vent. Samples of black smoker chimney from Rainbow site on the Atlantic mid-oceanic ridge have been harvested for enriching exoelectrogens in microbial electrolysis cells under hyperthermophilic (80 degrees C) condition. Two enrichments were performed in a BioElectrochemical System specially designed: one from direct inoculation of crushed chimney and the other one from inoculation of a pre-cultivation on iron (III) oxide. In both experiments, a current production was observed from 2.4 A/m(2) to 5.8 A/m(2) with a set anode potential of -0.110 V vs Ag/AgCl. Taxonomic affiliation of the exoelectrogen communities obtained on the electrode exhibited a specific enrichment of Archaea belonging to Thermococcales and Archeoglobales orders, even when both inocula were dominated by Bacteria.
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