Journal ArticleDOI
Sustainable Power Generation in Microbial Fuel Cells Using Bicarbonate Buffer and Proton Transfer Mechanisms
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TLDR
In this paper, the performance of cloth electrode assemblies (CEA) with bicarbonate buffer solutions was evaluated using a facilitated proton transfer mechanism for MFCs in the presence of pH buffers.Abstract:
Phosphate buffer solution has been commonly used in MFC studies to maintain a suitable pH for electricity-generating bacteria and/or to increase the solution conductivity. However, addition of a high concentration of phosphate buffer in MFCs could be expensive, especially for wastewater treatment. In this study, the performances of MFCs with cloth electrode assemblies (CEA) were evaluated using bicarbonate buffer solutions. A maximum power density of 1550 W/m3 (2770 mW/m2) was obtained at a current density of 0.99 mA/cm2 using a pH 9 bicarbonate buffer solution. Such a power density was 38.6% higher than that using a pH 7 phosphate buffer at the same concentration of 0.2 M. Based on the quantitative comparison of free proton transfer rates, diffusion rates of pH buffer species, and the current generated, a facilitated proton transfer mechanism was proposed for MFCs in the presence of the pH buffers. The excellent performance of MFCs using bicarbonate as pH buffer and proton carrier indicates that bicarbon...read more
Citations
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Exoelectrogenic bacteria that power microbial fuel cells
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Microbial fuel cells: From fundamentals to applications. A review
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Towards practical implementation of bioelectrochemical wastewater treatment.
René A. Rozendal,René A. Rozendal,Hubertus V.M. Hamelers,Korneel Rabaey,Jurg Keller,Cees J.N. Buisman +5 more
TL;DR: These challenges are identified, an overview of their implications for the feasibility of bioelectrochemical wastewater treatment is provided and the opportunities for future BESs are explored.
References
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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.
Journal ArticleDOI
Novel mode of microbial energy metabolism: organic carbon oxidation coupled to dissimilatory reduction of iron or manganese.
TL;DR: This is the first demonstration that microorganisms can completely oxidize organic compounds with Fe(III) or Mn(IV) as the sole electron acceptor and that oxidation of organic matter coupled to dissimilatory Fe( III), Mn( IV), or Mn (IV) reduction can yield energy for microbial growth.
Journal ArticleDOI
Electricity production by geobacter sulfurreducens attached to electrodes
Daniel R. Bond,Derek R. Lovley +1 more
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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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