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How Comparable are Microbial Electrochemical Systems around the Globe? An Electrochemical and Microbiological Cross‐Laboratory Study

Santoro, Carlo and Babanova, Sofia and Cristiani, Pierangela and Artyushkova, Kateryna and Atanassov, Plamen and Bergel, Alain and Bretschger, Orianna and Brown, Robert K. and Carpenter, Kayla and Colombo, Alessandra and Cortese, Rachel and Erable, Benjamin and Harnisch, Falk and Kodali, Mounika and Phadke, Sujal and Riedl, Sebastian and Rosa, Luis F. M. and Schröder, Uwe How Comparable are Microbial Electrochemical Systems around the Globe? An Electrochemical and Microbiological Cross‐Laboratory Study. (2021) ChemSusChem, 14 (11). 2313-2330. ISSN 1864-5631

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Official URL: https://doi.org/10.1002/cssc.202100825

Abstract

A cross‐laboratory study on microbial fuel cells (MFC) which involved different institutions around the world is presented. The study aims to assess the development of autochthone microbial pools enriched from domestic wastewater, cultivated in identical single‐chamber MFCs, operated in the same way, thereby approaching the idea of developing common standards for MFCs. The MFCs are inoculated with domestic wastewater in different geographic locations. The acclimation stage and, consequently, the startup time are longer or shorter depending on the inoculum, but all MFCs reach similar maximum power outputs (55±22 μW cm−2) and COD removal efficiencies (87±9 %), despite the diversity of the bacterial communities. It is inferred that the MFC performance starts when the syntrophic interaction of fermentative and electrogenic bacteria stabilizes under anaerobic conditions at the anode. The generated power is mostly limited by electrolytic conductivity, electrode overpotentials, and an unbalanced external resistance. The enriched microbial consortia, although composed of different bacterial groups, share similar functions both on the anode and the cathode of the different MFCs, resulting in similar electrochemical output.

Item Type:Article
Additional Information:Licence : CC BY 4.0
HAL Id:hal-03265863
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: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:
Italian Ministry of Education, Universities and Research (Ministero dell’Istruzione, dell’Università e della Ricerca – MIUR) - BMBF (Research Award “Next generation biotechnological processes – Biotechnology 2020+") - Helmholtz-Association (Young Investigators Group) - Research Fund for the Italian Electrical System
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Deposited On:21 Jun 2021 10:24

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