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Hypersaline microbial fuel cell equipped with an oxygen-reducing microbial cathode

Rimboud, Mickaël and Etcheverry, Luc and Barakat, Mohamed and Achouak, Wafa and Bergel, Alain and Délia, Marie-Line Hypersaline microbial fuel cell equipped with an oxygen-reducing microbial cathode. (2021) Bioresource Technology, 337. 125448. ISSN 0960-8524

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Official URL: https://doi.org/10.1016/j.biortech.2021.125448

Abstract

Microbial anodes and oxygen reducing microbial cathodes were designed separately under constant polarization at +0.1 V/SCE in a hypersaline medium (NaCl 45 g/L). They were then associated to design two-compartment microbial fuel cells (MFCs). These MFCs produced up to 209 ±24 mW m-2 during a week. This was the first demonstration that hypersaline MFCs equipped with microbial cathodes can produce power density at this level. Desulfuromonas sp. were confirmed to be key species of the anodes. The efficiency of the cathodes was linked to the development of a redox system centred at +0.2 V/SCE and to the presence of Gammaproteobacteria (Alteromonadales and Oceanospirillales), especially an unclassified order phylogenetically linked to the genus Thioalobacter. Comparing the different performance of the four MFCs with the population analyses suggested that polarization at +0.1V/SCE should be maintained longer to promote the growth of Thioalobacter on the cathode and thus increase the MFC performance.

Item Type:Article
HAL Id:hal-03295885
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Aix-Marseille Université - AMU (FRANCE)
French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Funders:
Agence Nationale de la Recherche - ANR (FRANCE)
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Deposited On:22 Jul 2021 11:40

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