Journal ArticleDOI
Electricity generation by direct oxidation of glucose in mediatorless microbial fuel cells
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TLDR
A novel microorganism is reported on, Rhodoferax ferrireducens, that can oxidize glucose to CO2 and quantitatively transfer electrons to graphite electrodes without the need for an electron-shuttling mediator, which results in stable, long-term power production.Abstract:
Abundant energy, stored primarily in the form of carbohydrates, can be found in waste biomass from agricultural, municipal and industrial sources as well as in dedicated energy crops, such as corn and other grains. Potential strategies for deriving useful forms of energy from carbohydrates include production of ethanol and conversion to hydrogen, but these approaches face technical and economic hurdles. An alternative strategy is direct conversion of sugars to electrical power. Existing transition metal-catalyzed fuel cells cannot be used to generate electric power from carbohydrates. Alternatively, biofuel cells in which whole cells or isolated redox enzymes catalyze the oxidation of the sugar have been developed, but their applicability has been limited by several factors, including (i) the need to add electron-shuttling compounds that mediate electron transfer from the cell to the anode, (ii) incomplete oxidation of the sugars and (iii) lack of long-term stability of the fuel cells. Here we report on a novel microorganism, Rhodoferax ferrireducens, that can oxidize glucose to CO(2) and quantitatively transfer electrons to graphite electrodes without the need for an electron-shuttling mediator. Growth is supported by energy derived from the electron transfer process itself and results in stable, long-term power production.read more
Citations
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Journal ArticleDOI
Microbial Fuel Cells: Methodology and Technology†
Bruce E. Logan,Bert Hamelers,René A. Rozendal,Uwe Schröder,Jurg Keller,Stefano Freguia,P. Aelterman,Willy Verstraete,Korneel Rabaey +8 more
TL;DR: A review of the different materials and methods used to construct MFCs, techniques used to analyze system performance, and recommendations on what information to include in MFC studies and the most useful ways to present results are provided.
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Exoelectrogenic bacteria that power microbial fuel cells
TL;DR: This Progress article explores the underlying reasons for exocellular electron transfer, including cellular respiration and possible cell–cell communication, to understand bacterial versatility in mechanisms used for current generation.
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Microbial fuel cells: novel biotechnology for energy generation
Korneel Rabaey,Willy Verstraete +1 more
TL;DR: How bacteria use an anode as an electron acceptor and to what extent they generate electrical output is discussed and the MFC technology is evaluated relative to current alternatives for energy generation.
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Electricity generation using an air-cathode single chamber microbial fuel cell in the presence and absence of a proton exchange membrane.
Hong Liu,Bruce E. Logan +1 more
TL;DR: An analysis based on available anode surface area and maximum bacterial growth rates suggests that mediatorless MFCs may have an upper order-of-magnitude limit in power density of 10(3) mW/m2.
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A state of the art review on microbial fuel cells: A promising technology for wastewater treatment and bioenergy.
Zhuwei Du,Haoran Li,Tingyue Gu +2 more
TL;DR: A critical review on the recent advances in MFC research with emphases on MFC configurations and performances is presented.
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Electricity production by geobacter sulfurreducens attached to electrodes
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TL;DR: The results suggest that the effectiveness of microbial fuel cells can be increased with organisms such as G. sulfurreducens that can attach to electrodes and remain viable for long periods of time while completely oxidizing organic substrates with quantitative transfer of electrons to an electrode.
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