Implementation of a Sulfide–Air Fuel Cell Coupled to a Sulfate-Reducing Biocathode for Elemental Sulfur Recovery
Abstract
:1. Introduction
2. Experimental
2.1. Reactor Description
2.2. Biotic and Abiotic Reactions in the BES-FC Process
2.3. Operational Conditions
2.4. Analytical Methods
2.5. Calculations
3. Results and Discussion
3.1. Effect of Additional Oxygen Input on the Autotrophic Biocathode
3.2. Microbial Electrochemical Cell and Sulfide–Air Fuel Cell Integration
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Period | Days of Operation | Sulfate Influent [mg S L−1] | BES-Cathode Potential [V vs. SHE] | pH | HRT [d] | FC Operation |
---|---|---|---|---|---|---|
Start-up | 0–52 | 500 | −0.7 to −0.9 | 7.0 | 3.1–1.1 | Off |
I | 52–87 | 2000 | −0.9 | 7.0 | 1.1 | Off |
II | 87–94 | 2000 | −0.9 | 7.0 | 1.1 | On |
III 1 | 94–145 | 2000 | −0.95 | 7.5 | 1.1 | On |
IV 2 | 145–161 | 2000 | −0.98 ± 0.01 | 7.5 | 1.1 | On |
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Blázquez, E.; Gabriel, D.; Baeza, J.A.; Guisasola, A.; Ledezma, P.; Freguia, S. Implementation of a Sulfide–Air Fuel Cell Coupled to a Sulfate-Reducing Biocathode for Elemental Sulfur Recovery. Int. J. Environ. Res. Public Health 2021, 18, 5571. https://doi.org/10.3390/ijerph18115571
Blázquez E, Gabriel D, Baeza JA, Guisasola A, Ledezma P, Freguia S. 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. 2021; 18(11):5571. https://doi.org/10.3390/ijerph18115571
Chicago/Turabian StyleBlázquez, Enric, David Gabriel, Juan Antonio Baeza, Albert Guisasola, Pablo Ledezma, and Stefano Freguia. 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, no. 11: 5571. https://doi.org/10.3390/ijerph18115571