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Implementation of a Sulfide–Air Fuel Cell Coupled to a Sulfate-Reducing Biocathode for Elemental Sulfur Recovery

Author

Listed:
  • Enric Blázquez

    (GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain)

  • David Gabriel

    (GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain)

  • Juan Antonio Baeza

    (GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain)

  • Albert Guisasola

    (GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain)

  • Pablo Ledezma

    (Advanced Water Management Centre, The University of Queensland, Brisbane 4072, Australia)

  • Stefano Freguia

    (Advanced Water Management Centre, The University of Queensland, Brisbane 4072, Australia
    Current address: Department of Chemical Engineering, University of Melbourne, Victoria 3010, Australia.)

Abstract

Bio-electrochemical systems (BES) are a flexible biotechnological platform that can be employed to treat several types of wastewaters and recover valuable products concomitantly. Sulfate-rich wastewaters usually lack an electron donor; for this reason, implementing BES to treat the sulfate and the possibility of recovering the elemental sulfur (S 0 ) offers a solution to this kind of wastewater. This study proposes a novel BES configuration that combines bio-electrochemical sulfate reduction in a biocathode with a sulfide–air fuel cell (FC) to recover S 0 . The proposed system achieved high elemental sulfur production rates (up to 386 mg S 0 -S L −1 d −1 ) with 65% of the sulfate removed recovered as S 0 and a 12% lower energy consumption per kg of S 0 produced (16.50 ± 0.19 kWh kg −1 S 0 -S) than a conventional electrochemical S 0 recovery system.

Suggested Citation

  • Enric Blázquez & David Gabriel & Juan Antonio Baeza & Albert Guisasola & Pablo Ledezma & Stefano Freguia, 2021. "Implementation of a Sulfide–Air Fuel Cell Coupled to a Sulfate-Reducing Biocathode for Elemental Sulfur Recovery," IJERPH, MDPI, vol. 18(11), pages 1-11, May.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:11:p:5571-:d:560503
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    Citations

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    Cited by:

    1. Adrián Hernández-Fernández & Eduardo Iniesta-López & Yolanda Garrido & Ioannis A. Ieropoulos & Francisco J. Hernández-Fernández, 2023. "Microbial Fuel Cell Using a Novel Ionic-Liquid-Type Membrane-Cathode Assembly with Heterotrophic Anodic Denitrification for Slurry Treatment," Sustainability, MDPI, vol. 15(20), pages 1-18, October.

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