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Suspended anode-type microbial fuel cells for enhanced electricity generation

Electricity generation in microbial fuel cells can be restricted by a few factors, such as the effective area of the anode for biofilm attachment, diffusion limitation of substrates and internal resistance. In this paper, a suspended anode (carbon-based felt granule)-type microbial fuel cell was dev...

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Autores principales: Liu, Yiyang, Sun, Xiaoyan, Yin, Di, Cai, Lankun, Zhang, Lehua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9050365/
https://www.ncbi.nlm.nih.gov/pubmed/35498583
http://dx.doi.org/10.1039/c9ra08288c
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author Liu, Yiyang
Sun, Xiaoyan
Yin, Di
Cai, Lankun
Zhang, Lehua
author_facet Liu, Yiyang
Sun, Xiaoyan
Yin, Di
Cai, Lankun
Zhang, Lehua
author_sort Liu, Yiyang
collection PubMed
description Electricity generation in microbial fuel cells can be restricted by a few factors, such as the effective area of the anode for biofilm attachment, diffusion limitation of substrates and internal resistance. In this paper, a suspended anode (carbon-based felt granule)-type microbial fuel cell was developed to make full use of the volume of the anode chamber and provide a larger surface area of the anode for the growth of exoelectrogenic bacteria. The current collector was rotated in the anodic chamber to contact with the suspended granules intermittently and achieve better mixing. The open-circuit voltage reached steady state at around 0.83 V. The maximum power density obtained from each scenario increased steadily with the increase in mixing rate. The internal resistance decreased when the rotational rate and the content of the carbon granules were increased. The maximum power density reached 951 ± 14 mW m(−3) with a corresponding minimum internal resistance of 162.9 ± 3.5 Ω when the mass of carbon granules was 50 g and the rotational rate was 300 rpm. The suspended microbes made negligible contribution to the power density. The microbial fuel cell with a higher content of carbon granules had lower coulombic efficiency and lower relative abundance of exoelectrogenic bacteria.
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spelling pubmed-90503652022-04-29 Suspended anode-type microbial fuel cells for enhanced electricity generation Liu, Yiyang Sun, Xiaoyan Yin, Di Cai, Lankun Zhang, Lehua RSC Adv Chemistry Electricity generation in microbial fuel cells can be restricted by a few factors, such as the effective area of the anode for biofilm attachment, diffusion limitation of substrates and internal resistance. In this paper, a suspended anode (carbon-based felt granule)-type microbial fuel cell was developed to make full use of the volume of the anode chamber and provide a larger surface area of the anode for the growth of exoelectrogenic bacteria. The current collector was rotated in the anodic chamber to contact with the suspended granules intermittently and achieve better mixing. The open-circuit voltage reached steady state at around 0.83 V. The maximum power density obtained from each scenario increased steadily with the increase in mixing rate. The internal resistance decreased when the rotational rate and the content of the carbon granules were increased. The maximum power density reached 951 ± 14 mW m(−3) with a corresponding minimum internal resistance of 162.9 ± 3.5 Ω when the mass of carbon granules was 50 g and the rotational rate was 300 rpm. The suspended microbes made negligible contribution to the power density. The microbial fuel cell with a higher content of carbon granules had lower coulombic efficiency and lower relative abundance of exoelectrogenic bacteria. The Royal Society of Chemistry 2020-03-09 /pmc/articles/PMC9050365/ /pubmed/35498583 http://dx.doi.org/10.1039/c9ra08288c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Liu, Yiyang
Sun, Xiaoyan
Yin, Di
Cai, Lankun
Zhang, Lehua
Suspended anode-type microbial fuel cells for enhanced electricity generation
title Suspended anode-type microbial fuel cells for enhanced electricity generation
title_full Suspended anode-type microbial fuel cells for enhanced electricity generation
title_fullStr Suspended anode-type microbial fuel cells for enhanced electricity generation
title_full_unstemmed Suspended anode-type microbial fuel cells for enhanced electricity generation
title_short Suspended anode-type microbial fuel cells for enhanced electricity generation
title_sort suspended anode-type microbial fuel cells for enhanced electricity generation
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9050365/
https://www.ncbi.nlm.nih.gov/pubmed/35498583
http://dx.doi.org/10.1039/c9ra08288c
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