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The Influence of External Load on the Performance of Microbial Fuel Cells

Author

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  • Szymon Potrykus

    (Faculty of Electrical and Control Engineering, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland
    Department of Chemical Engineering, ITQUIMA, University of Castilla-La Mancha, Av. Camilo Jose Cela, S/N, 13071 Ciudad Real, Spain)

  • Luis Fernando León-Fernández

    (Department of Chemical Engineering, ITQUIMA, University of Castilla-La Mancha, Av. Camilo Jose Cela, S/N, 13071 Ciudad Real, Spain)

  • Janusz Nieznański

    (Faculty of Electrical and Control Engineering, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland)

  • Dariusz Karkosiński

    (Faculty of Electrical and Control Engineering, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland)

  • Francisco Jesus Fernandez-Morales

    (Department of Chemical Engineering, ITQUIMA, University of Castilla-La Mancha, Av. Camilo Jose Cela, S/N, 13071 Ciudad Real, Spain)

Abstract

In this work, the effect of the external load on the current and power generation, as well as on the pollutant removal by microbial fuel cells (MFCs), has been studied by step-wise modifying the external load. The load changes included a direct scan, in which the external resistance was increased from 120 Ω to 3300 Ω, and a subsequent reverse scan, in which the external resistance was decreased back to 120 Ω. The reduction in the current, experienced when increasing the external resistance, was maintained even in the reverse scan when the external resistance was step-wise decreased. Regarding the power exerted, when the external resistance was increased below the value of the internal resistance, an enhancement in the power exerted was observed. However, when operating near the value of the internal resistance, a stable power exerted of about 1.6 µW was reached. These current and power responses can be explained by the change in population distribution, which shifts to a more fermentative than electrogenic culture, as was confirmed by the population analyses. Regarding the pollutant removal, the effluent chemical oxygen demand (COD) decreased when the external resistance increased up to the internal resistance value. However, the effluent COD increased when the external resistance was higher than the internal resistance. This behavior was maintained in the reverse scan, which confirmed the modification in the microbial population of the MFC.

Suggested Citation

  • Szymon Potrykus & Luis Fernando León-Fernández & Janusz Nieznański & Dariusz Karkosiński & Francisco Jesus Fernandez-Morales, 2021. "The Influence of External Load on the Performance of Microbial Fuel Cells," Energies, MDPI, vol. 14(3), pages 1-11, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:612-:d:486919
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    References listed on IDEAS

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    1. Gonzalez del Campo, A. & Lobato, J. & Cañizares, P. & Rodrigo, M.A. & Fernandez Morales, F.J., 2013. "Short-term effects of temperature and COD in a microbial fuel cell," Applied Energy, Elsevier, vol. 101(C), pages 213-217.
    2. Szymon Potrykus & Filip Kutt & Janusz Nieznański & Francisco Jesús Fernández Morales, 2020. "Advanced Lithium-Ion Battery Model for Power System Performance Analysis," Energies, MDPI, vol. 13(10), pages 1-15, May.
    3. Beegle, Jeffrey R. & Borole, Abhijeet P., 2018. "Energy production from waste: Evaluation of anaerobic digestion and bioelectrochemical systems based on energy efficiency and economic factors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 96(C), pages 343-351.
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    Cited by:

    1. Agnieszka Cydzik-Kwiatkowska & Dawid Nosek, 2022. "Advances in Microbial Fuel Cell Technologies," Energies, MDPI, vol. 15(16), pages 1-3, August.
    2. Walter Rojas-Villacorta & Segundo Rojas-Flores & Santiago M. Benites & Renny Nazario-Naveda & Cecilia V. Romero & Moisés Gallozzo-Cardenas & Daniel Delfín-Narciso & Félix Díaz & Emzon Murga-Torres, 2023. "Preliminary Study of Bioelectricity Generation Using Lettuce Waste as Substrate by Microbial Fuel Cells," Sustainability, MDPI, vol. 15(13), pages 1-14, June.
    3. Opoku, Prince Atta & Jingyu, Huang & Yi, Li & Ewusi-Mensah, David & Miwornunyuie, Nicholas, 2023. "Scalability of the multi-anode plug flow microbial fuel cell as a sustainable prospect for large-scale design," Renewable Energy, Elsevier, vol. 207(C), pages 693-702.

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