Enrichment of microbial electrolysis cell biocathodes from sediment microbial fuel cell bioanodes.

ABSTRACT: Electron-accepting (electrotrophic) biocathodes were produced by first enriching graphite fiber brush electrodes as the anodes in sediment-type microbial fuel cells (sMFCs) using two different marine sediments and then electrically inverting the anodes to function as cathodes in two-chamber bioelectrochemical systems (BESs). Electron consumption occurred at set potentials of -439 mV and -539 mV (versus the potential of a standard hydrogen electrode) but not at -339 mV in minimal media lacking organic sources of energy. Results at these different potentials were consistent with separate linear sweep voltammetry (LSV) scans that indicated enhanced activity (current consumption) below only ca. -400 mV. MFC bioanodes not originally acclimated at a set potential produced electron-accepting (ele

SUBMITTER: Pisciotta JM 

PROVIDER: S-EPMC3416445 | biostudies-literature | 2012 Aug

REPOSITORIES: biostudies-literature