<abstract xmlns="http://www.w3.org/1999/xhtml">

Electricigens decompose organic matter and convert stored chemical energy into electrical energy through extracellular electron transfer. They are significant biocatalysts for microbial fuel cells with practical applications in green energy generation, effluent treatment, and bioremediation. A facultative anaerobic electrogenic strain SQ-1 is isolated from sludge in a biotechnology factory. The strain SQ-1 is a close relative of <italic>Klebsiella variicola</italic>. Multilayered biofilms form on the surface of a carbon electrode after the isolated bacteria are inoculated into a microbial fuel cell device. This strain produces high current densities of 625 μA cm–2 by using acetate as the carbon source in a three-electrode configuration. The electricity generation performance is also analyzed in a dual-chamber microbial fuel cell. It reaches a maximum power density of 560 mW m–2 when the corresponding output voltage is 0.59 V. The facultative strain SQ-1 utilizes hydrous ferric oxide as an electron acceptor to perform extracellular electricigenic respiration in anaerobic conditions. Since facultative strains possess better properties than anaerobic strains, <italic>Klebsiella</italic> sp. SQ-1 may be a promising exoelectrogenic strain for applications in microbial electrochemistry.
<fig id="j_pjm-2024-013_fig_006" position="float" fig-type="figure">
<graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/j_pjm-2024-013_fig_006.jpg"></graphic>
</fig>
</abstract>

Electricigens decompose organic matter and convert stored chemical energy into electrical energy through extracellular electron transfer. They are significant biocatalysts for microbial fuel cells with practical applications in green energy generation, effluent treatment, and bioremediation. A facultative anaerobic electrogenic strain SQ-1 is isolated from sludge in a biotechnology factory. The strain SQ-1 is a close relative of Klebsiella variicola. Multilayered biofilms form on the surface of a carbon electrode after the isolated bacteria are inoculated into a microbial fuel cell device. This strain produces high current densities of 625 μA cm–2 by using acetate as the carbon source in a three-electrode configuration. The electricity generation performance is also analyzed in a dual-chamber microbial fuel cell. It reaches a maximum power density of 560 mW m–2 when the corresponding output voltage is 0.59 V. The facultative strain SQ-1 utilizes hydrous ferric oxide as an electron acceptor to perform extracellular electricigenic respiration in anaerobic conditions. Since facultative strains possess better properties than anaerobic strains, Klebsiella sp. SQ-1 may be a promising exoelectrogenic strain for applications in microbial electrochemistry.

Isolation and Electrochemical Analysis of a Facultative Anaerobic Electrogenic Strain <italic>Klebsiella</italic> sp. SQ-1

Polish Journal of Microbiology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Isolation and Electrochemical Analysis of a Facultative Anaerobic Electrogenic Strain  sp. SQ-1

Electricigens decompose organic matter and convert stored chemical energy into electrical energy through extracellular electron transfer. They are significant...

Isolation and Electrochemical Analysis of a Facultative Anaerobic Electrogenic Strain Klebsiella sp. SQ-1

Article Category: ORIGINAL PAPER

Published Online: Apr 27, 2024

Page range: -

Received: Dec 07, 2023

Accepted: Feb 26, 2024

DOI: https://doi.org/10.33073/pjm-2024-013

Keywords
microbial fuel cell, sp., electrochemical analysis, extracellular respiration, facultative electricigens

© 2024 Lei Zhou et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Isolation and Electrochemical Analysis of a Facultative Anaerobic Electrogenic Strain Klebsiella sp. SQ-1

Article Category: ORIGINAL PAPER

Published Online: Apr 27, 2024

Page range: -

Received: Dec 07, 2023

Accepted: Feb 26, 2024

DOI: https://doi.org/10.33073/pjm-2024-013

Keywordsmicrobial fuel cell, sp., electrochemical analysis, extracellular respiration, facultative electricigens

© 2024 Lei Zhou et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
microbial fuel cell, sp., electrochemical analysis, extracellular respiration, facultative electricigens