Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells
KAUST Grant NumberKUS-I1-003-13
Permanent link to this recordhttp://hdl.handle.net/10754/597835
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Abstract© 2015 Elsevier B.V. A conjugated oligoelectrolyte (COE), which spontaneously aligns within cell membranes, was shown to completely inhibit H2 uptake by Geobacter sulfurreducens in microbial electrolysis cells. Coulombic efficiencies that were 490±95%, due to H2 recycling between the cathode and microorganisms on the anode, were reduced to 86±2% with COE addition. The use of the COE resulted in a 67-fold increase in H2 gas recovery, and a 4.4-fold increase in acetate removal. Current generation, H2 recovery and COD removals by Geobacter metallireducens, which cannot use H2, were unaffected by COE addition. These results show that this COE is an effective H2 uptake inhibitor, and that it can enable improved and sustained H2 gas recovery in this bioelectrochemical system.
CitationLiu J, Hou H, Chen X, Bazan GC, Kashima H, et al. (2015) Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells. Bioelectrochemistry 106: 379–382. Available: http://dx.doi.org/10.1016/j.bioelechem.2015.07.001.
SponsorsFunding for this research was provided by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) (Pennsylvania State University) and the Institute for Collaborative Biotechnologies through grant W911NF-09-0001 from the U.S. Army Research Office (University of California,Santa Barbara).
CollectionsPublications Acknowledging KAUST Support
- Hydrogen production by geobacter species and a mixed consortium in a microbial electrolysis cell.
- Authors: Call DF, Wagner RC, Logan BE
- Issue date: 2009 Dec
- Electricity-assisted biological hydrogen production from acetate by Geobacter sulfurreducens.
- Authors: Geelhoed JS, Stams AJ
- Issue date: 2011 Jan 15
- Lactate oxidation coupled to iron or electrode reduction by Geobacter sulfurreducens PCA.
- Authors: Call DF, Logan BE
- Issue date: 2011 Dec
- Acetate oxidation by syntrophic association between Geobacter sulfurreducens and a hydrogen-utilizing exoelectrogen.
- Authors: Kimura Z, Okabe S
- Issue date: 2013 Aug
- Oxidation of glucose by syntrophic association between Geobacter and hydrogenotrophic methanogens in microbial fuel cell.
- Authors: Oyiwona GE, Ogbonna J, Anyanwu CU, Ishizaki S, Kimura ZI, Okabe S
- Issue date: 2017 Feb