Implementation of a Sulfide-Air Fuel Cell Coupled to a Sulfate-Reducing Biocathode for Elemental Sulfur Recovery
AuthorBlazquez, E; Gabriel, D; Baeza, JA; Guisasola, A; Ledezma, P; Freguia, S
Source TitleInternational Journal of Environmental Research and Public Health
University of Melbourne Author/sFreguia, Stefano
AffiliationChemical and Biomolecular Engineering
Document TypeJournal Article
CitationsBlazquez, E., Gabriel, D., Baeza, J. A., Guisasola, A., Ledezma, P. & Freguia, S. (2021). Implementation of a Sulfide-Air Fuel Cell Coupled to a Sulfate-Reducing Biocathode for Elemental Sulfur Recovery. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, 18 (11), https://doi.org/10.3390/ijerph18115571.
Access StatusOpen Access
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 (S0) 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 S0. The proposed system achieved high elemental sulfur production rates (up to 386 mg S0-S L-1 d-1) with 65% of the sulfate removed recovered as S0 and a 12% lower energy consumption per kg of S0 produced (16.50 ± 0.19 kWh kg-1 S0-S) than a conventional electrochemical S0 recovery system.
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