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Microbial fuel cell scale-up options: Performance evaluation of membrane (c-MFC) and membrane-less (s-MFC) systems under different feeding regimes

Walter, Xavier Alexis; Madrid, Elena; Gajda, Iwona; Greenman, John; Ieropoulos, Ioannis

Microbial fuel cell scale-up options: Performance evaluation of membrane (c-MFC) and membrane-less (s-MFC) systems under different feeding regimes Thumbnail


Authors

Elena Madrid

Iwona Serruys Iwona.Gajda@uwe.ac.uk
Senior Lecturer in Engineering Management

John Greenman

Yannis Ieropoulos Ioannis2.Ieropoulos@uwe.ac.uk
Professor in Bioenergy & Director of B-B



Abstract

In recent years, bioelectrochemical systems have advanced towards upscaling applications and tested during field trials, primarily for wastewater treatment. Amongst reported trials, two designs of urine-fed microbial fuel cells (MFCs) were tested successfully on a pilot scale as autonomous sanitation systems for decentralised area. These designs, known as ceramic MFCs (c-MFCs) and self-stratifying MFCs (s-MFC), have never been calibrated under similar conditions. Here, the most advanced versions of both designs were assembled and tested under similar feeding conditions. The performance and efficiency were evaluated under different hydraulic retention times (HRT), through chemical oxygen demand measures and polarisation experiments. Results show that c-MFCs displayed constant performance independently from the HRT (32.2 ± 3.9 W m−3) whilst displaying high energy conversion efficiency at longer HRT (NERCOD = 2.092 ± 0.119 KWh.KgCOD−1, at 24h HRT). The s-MFC showed a correlation between performance and HRT. The highest performance was reached under short HRT (69.7 ± 0.4 W m−3 at 3h HRT), but the energy conversion efficiency was constant independently from the HRT (0.338 ± 0.029 KWh.KgCOD−1). The c-MFCs and s-MFCs similarly showed the highest volumetric efficiency under long HRT (65h) with NERV of 0.747 ± 0.010 KWh.m−3 and 0.825 ± 0.086 KWh.m−3, respectively. Overall, c-MFCs seems more appropriate for longer HRT and s-MFCs for shorter HRT.

Citation

Walter, X. A., Madrid, E., Gajda, I., Greenman, J., & Ieropoulos, I. (2022). Microbial fuel cell scale-up options: Performance evaluation of membrane (c-MFC) and membrane-less (s-MFC) systems under different feeding regimes. Journal of Power Sources, 520, 230875. https://doi.org/10.1016/j.jpowsour.2021.230875

Journal Article Type Article
Acceptance Date Dec 4, 2021
Online Publication Date Dec 15, 2021
Publication Date Feb 1, 2022
Deposit Date Mar 14, 2023
Publicly Available Date Mar 14, 2023
Journal Journal of Power Sources
Print ISSN 0378-7753
Electronic ISSN 1873-2755
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 520
Pages 230875
DOI https://doi.org/10.1016/j.jpowsour.2021.230875
Keywords Electrical and Electronic Engineering; Physical and Theoretical Chemistry; Energy Engineering and Power Technology; Renewable Energy, Sustainability and the Environment
Public URL https://uwe-repository.worktribe.com/output/10389337
Publisher URL https://doi.org/10.1016/j.jpowsour.2021.230875

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