Outlook for benefits of sediment microbial fuel cells with two bio-electrodes.
The benefits of sediment microbial fuel cells (SMFCs) go beyond energy generation for low-power applications. Aside from producing electrical energy, SMFCs can enhance the oxidation of reduced compounds at the anode, thus bringing about the removal of excessive or unwanted reducing equivalents from submerged soils. Moreover, an SMFC could be applied to control redox-dependent processes in sediment layers. Several cathodic reactions that may drive these sediment oxidation reactions are examined. Special attention is given to two biologically mediated cathodic reactions, respectively employing an oxygen reduction and a manganese cycle. Both reactions imply a low cost and a high electrode potential and are of interest for reactor-type MFCs as well as for SMFCs.
Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Ghent, Belgium.
Liesje
L
De Schamphelaire
Korneel
K
Rabaey
Pascal
P
Boeckx
Nico
N
Boon
Willy
W
Verstraete
D001419:Bacteria / Q000737:chemistry / Q000378:metabolism*; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D004566:Electrodes / Q000382:microbiology*; D019015:Geologic Sediments / Q000737:chemistry / Q000382:microbiology*; D010084:Oxidation-Reduction
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