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Microorganisms
Special Issues
Microbial Fuel Cells: An Update
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Microbial Fuel Cells: An Update

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Microbial Biotechnology".

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 3039

Special Issue Editor

Dr. Naoufel Haddour

E-Mail Website
Guest Editor
Ampère Lab, Ecole Centrale de Lyon, 69134 Ecully, France
Interests: electrochemical sensors; biosensors; microbial fuel cells; wastewater treatment; electrochemical treatment; Galvano-Fenton process; biochar-based electrodes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Microbial Fuel Cells (MFCs) have emerged at the confluence of biotechnology and energy research, offering a sustainable and innovative method for energy production. The principles behind MFCs rely on the intriguing ability of certain microorganisms to directly transfer electrons to an electrode, thereby generating an electrical current during their metabolic processes. As we delve deeper into the mysteries of these unique microbes and refine the technology, MFCs not only present a potential solution for sustainable energy generation, but also open doors to wastewater treatment, biosensing, and many other applications.

In this Special Issue of Microorganisms, our primary focus is on the microbiological dimension of MFCs. Topics of interest include, but are not limited to:

  • Electrogenic Microorganisms in MFCs: Research that expands beyond known strains to explore novel organisms with electron transfer capabilities.
  • Microbial Interactions: Investigations into the relationships, both symbiotic and competitive, between microorganisms in MFCs and how they influence energy outputs.
  • Ecology of MFCs: Deep dives into the microbial community dynamics within MFCs and how these communities evolve over time.
  • Challenges and Frontiers: Scholarly reviews and research articles that address the microbiological challenges within MFCs and the potential avenues for overcoming them.

Dr. Naoufel Haddour
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Microorganisms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • microbial fuel cells
  • electrogenic microorganisms
  • microbial interactions
  • electron transfer capabilities
  • symbiotic relationships
  • competitive dynamics
  • microbial community dynamics
  • microbial ecology
  • microbiological challenges
  • evolution of microbial communities
  • MFC microbiology
  • novel microbial strains
  • microbial influence on energy outputs
  • microbial innovation in MFCs

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Published Papers (2 papers)

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17 pages, 3561 KiB  
Article
The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells
by Lea Ouaknin Hirsch, Bharath Gandu, Abhishiktha Chiliveru, Irina Amar Dubrovin, Shmuel Rozenfeld, Alex Schechter and Rivka Cahan
Microorganisms 2024, 12(3), 604; https://doi.org/10.3390/microorganisms12030604 - 18 Mar 2024
Cited by 2 | Viewed by 1481
Abstract
The bacterial anode in microbial fuel cells was modified by increasing the biofilm’s adhesion to the anode material using kaolin and graphite nanoparticles. The MFCs were inoculated with G. sulfurreducens, kaolin (12.5 g·L−1), and three different concentrations of graphite (0.25, [...] Read more.
The bacterial anode in microbial fuel cells was modified by increasing the biofilm’s adhesion to the anode material using kaolin and graphite nanoparticles. The MFCs were inoculated with G. sulfurreducens, kaolin (12.5 g·L−1), and three different concentrations of graphite (0.25, 1.25, and 2.5 g·L−1). The modified anode with the graphite nanoparticles (1.25 g·L−1) showed the highest electroactivity and biofilm viability. A potential of 0.59, 0.45, and 0.23 V and a power density of 0.54 W·m−2, 0.3 W·m−2, and 0.2 W·m−2 were obtained by the MFCs based on kaolin–graphite nanoparticles, kaolin, and bare anodes, respectively. The kaolin–graphite anode exhibited the highest Coulombic efficiency (21%) compared with the kaolin (17%) and the bare (14%) anodes. Scanning electron microscopy and confocal laser scanning microscopy revealed a large amount of biofilm on the kaolin–graphite anode. We assume that the graphite nanoparticles increased the charge transfer between the bacteria that are in the biofilm and are far from the anode material. The addition of kaolin and graphite nanoparticles increased the attachment of several bacteria. Thus, for MFCs that are fed with wastewater, the modified anode should be prepared with a pure culture of G. sulfurreducens before adding wastewater that includes non-exoelectrogenic bacteria. Full article
(This article belongs to the Special Issue Microbial Fuel Cells: An Update)
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16 pages, 3656 KiB  
Article
Metaproteomic and Metagenomic-Coupled Approach to Investigate Microbial Response to Electrochemical Conditions in Microbial Fuel Cells
by Alexiane Godain, Timothy M. Vogel, Jean-Michel Monnier, Agathe Paitier and Naoufel Haddour
Microorganisms 2023, 11(11), 2695; https://doi.org/10.3390/microorganisms11112695 - 3 Nov 2023
Cited by 1 | Viewed by 1204
Abstract
MFCs represent a promising sustainable biotechnology that enables the direct conversion of organic matter from wastewater into electricity using bacterial biofilms as biocatalysts. A crucial aspect of MFCs is how electroactive bacteria (EAB) behave and their associated mechanisms during extracellular electron transfer to [...] Read more.
MFCs represent a promising sustainable biotechnology that enables the direct conversion of organic matter from wastewater into electricity using bacterial biofilms as biocatalysts. A crucial aspect of MFCs is how electroactive bacteria (EAB) behave and their associated mechanisms during extracellular electron transfer to the anode. A critical phase in the MFC start-up process is the initial colonization of the anode by EAB. Two MFCs were operated with an external resistance of 1000 ohms, one with an applied electrical voltage of 500 mV during the initial four days of biofilm formation and the other without any additional applied voltage. After stabilization of electricity production, total DNA and protein were extracted and sequenced from both setups. The combined metaproteomic/metagenomic analysis revealed that the application of voltage during the colonization step predominantly increased direct electron transfer via cytochrome c, mediated primarily by Geobacter sp. Conversely, the absence of applied voltage during colonization resulted in a broader diversity of bacteria, including Pseudomonas and Aeromonas, which participated in electricity production via mediated electron transfer involving flavin family members. Full article
(This article belongs to the Special Issue Microbial Fuel Cells: An Update)
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