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Enrichment of microbial electrolysis cell biocathodes from sediment microbial fuel cell bioanodes. Appl Environ Microbiol 2012; 78:5212-9. [PMID: 22610438 DOI: 10.1128/aem.00480-12] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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 (electrotrophic) biocathodes, but bioanodes operated at a set potential (+11 mV) did not. CO(2) was removed from cathode headspace, indicating that the electrotrophic biocathodes were autotrophic. Hydrogen gas generation, followed by loss of hydrogen gas and methane production in one sample, suggested hydrogenotrophic methanogenesis. There was abundant microbial growth in the biocathode chamber, as evidenced by an increase in turbidity and the presence of microorganisms on the cathode surface. Clone library analysis of 16S rRNA genes indicated prominent sequences most similar to those of Eubacterium limosum (Butyribacterium methylotrophicum), Desulfovibrio sp. A2, Rhodococcus opacus, and Gemmata obscuriglobus. Transfer of the suspension to sterile cathodes made of graphite plates, carbon rods, or carbon brushes in new BESs resulted in enhanced current after 4 days, demonstrating growth by these microbial communities on a variety of cathode substrates. This report provides a simple and effective method for enriching autotrophic electrotrophs by the use of sMFCs without the need for set potentials, followed by the use of potentials more negative than -400 mV.
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Cheikhou K, Tzédakis T. Electrochemical microreactor for chiral syntheses using the cofactor NADH. AIChE J 2008. [DOI: 10.1002/aic.11463] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Voronin O, van Haaster D, Karyakina E, Hagen W, Karyakin A. Direct Bioelectrocatalysis by NADP-Reducing Hydrogenase fromPyrococcus furiosus. ELECTROANAL 2007. [DOI: 10.1002/elan.200703967] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Da Silva S, Basséguy R, Bergel A. Electron transfer between hydrogenase and 316L stainless steel: identification of a hydrogenase-catalyzed cathodic reaction in anaerobic mic. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.07.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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de la Garza L, Jeong G, Liddell PA, Sotomura T, Moore TA, Moore AL, Gust D. Enzyme-Based Photoelectrochemical Biofuel Cell. J Phys Chem B 2003. [DOI: 10.1021/jp030360j] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Linda de la Garza
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Advanced Technology Research Laboratories, Matsushita Electric Industrial Co. Ltd., Moriguchi, Osaka 570-8501, Japan
| | - Goojin Jeong
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Advanced Technology Research Laboratories, Matsushita Electric Industrial Co. Ltd., Moriguchi, Osaka 570-8501, Japan
| | - Paul A. Liddell
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Advanced Technology Research Laboratories, Matsushita Electric Industrial Co. Ltd., Moriguchi, Osaka 570-8501, Japan
| | - Tadashi Sotomura
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Advanced Technology Research Laboratories, Matsushita Electric Industrial Co. Ltd., Moriguchi, Osaka 570-8501, Japan
| | - Thomas A. Moore
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Advanced Technology Research Laboratories, Matsushita Electric Industrial Co. Ltd., Moriguchi, Osaka 570-8501, Japan
| | - Ana L. Moore
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Advanced Technology Research Laboratories, Matsushita Electric Industrial Co. Ltd., Moriguchi, Osaka 570-8501, Japan
| | - Devens Gust
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Advanced Technology Research Laboratories, Matsushita Electric Industrial Co. Ltd., Moriguchi, Osaka 570-8501, Japan
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Mechanism of the catalysis by Alcaligenes eutrophus H16 hydrogenase of direct electrochemical reduction of NAD+. J Electroanal Chem (Lausanne) 1999. [DOI: 10.1016/s0022-0728(99)00156-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Xiao YJ, Gao XX, Markwell J. In-situ monitoring of the interaction of lactate dehydrogenase with NAD on a gold electrode by FT-SERS. J Electroanal Chem (Lausanne) 1999. [DOI: 10.1016/s0022-0728(99)00093-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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