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Anolyte recycling enhanced bioelectricity generation of the buffer-free single-chamber air-cathode microbial fuel cell

•Anolyte recycling enhanced HCO3− accumulation in the buffer-free anolyte.•Anolyte recycling eliminated the anolyte acidification in buffer-free MFC.•Anolyte recycling dramatically improved the electric power of buffer-free MFC.•Anolyte recycling induced the growth of Geoalkalibacter genus in anode... Full description

Journal Title: Bioresource Technology November 2017, Vol.244, pp.1183-1187
Main Author: Ren, Yueping
Other Authors: Chen, Jinli , Shi, Yugang , Li, Xiufen , Yang, Na , Wang, Xinhua
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0960-8524 ; DOI: 10.1016/j.biortech.2017.08.073
Link: http://dx.doi.org/10.1016/j.biortech.2017.08.073
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recordid: sciversesciencedirect_elsevierS0960-8524(17)31378-0
title: Anolyte recycling enhanced bioelectricity generation of the buffer-free single-chamber air-cathode microbial fuel cell
format: Article
creator:
  • Ren, Yueping
  • Chen, Jinli
  • Shi, Yugang
  • Li, Xiufen
  • Yang, Na
  • Wang, Xinhua
subjects:
  • Microbial Fuel Cell
  • Buffer-Free
  • Anolyte Acidification
  • Anolyte Recycling
  • Self-Buffering
ispartof: Bioresource Technology, November 2017, Vol.244, pp.1183-1187
description: •Anolyte recycling enhanced HCO3− accumulation in the buffer-free anolyte.•Anolyte recycling eliminated the anolyte acidification in buffer-free MFC.•Anolyte recycling dramatically improved the electric power of buffer-free MFC.•Anolyte recycling induced the growth of Geoalkalibacter genus in anode biofilm. Anolyte acidification is an inevitable restriction for the bioelectricity generation of buffer-free microbial fuel cells (MFCs). In this work, acidification of the buffer-free KCl anolyte has been thoroughly eliminated through anolyte recycling. The accumulated HCO3− concentration in the recycled KCl anolyte was above 50mM, which played as natural buffer and elevated the anolyte pH to above 8. The maximum power density (Pmax) increased from 322.9mWm−2 to 527.2mWm−2, which is comparable with the phosphate buffered MFC. Besides Geobacter genus, the gradually increased anolyte pH and conductivity induced the growing of electrochemically active Geoalkalibacter genus, in the anode biofilm. Anolyte recycling is a feasible strategy to strengthen the self-buffering capacity of buffer-free MFCs, thoroughly eliminate the anolyte acidification and prominently enhance the electric power.
language: eng
source:
identifier: ISSN: 0960-8524 ; DOI: 10.1016/j.biortech.2017.08.073
fulltext: no_fulltext
issn:
  • 09608524
  • 0960-8524
url: Link


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titleAnolyte recycling enhanced bioelectricity generation of the buffer-free single-chamber air-cathode microbial fuel cell
creatorRen, Yueping ; Chen, Jinli ; Shi, Yugang ; Li, Xiufen ; Yang, Na ; Wang, Xinhua
ispartofBioresource Technology, November 2017, Vol.244, pp.1183-1187
identifierISSN: 0960-8524 ; DOI: 10.1016/j.biortech.2017.08.073
subjectMicrobial Fuel Cell ; Buffer-Free ; Anolyte Acidification ; Anolyte Recycling ; Self-Buffering
description•Anolyte recycling enhanced HCO3− accumulation in the buffer-free anolyte.•Anolyte recycling eliminated the anolyte acidification in buffer-free MFC.•Anolyte recycling dramatically improved the electric power of buffer-free MFC.•Anolyte recycling induced the growth of Geoalkalibacter genus in anode biofilm. Anolyte acidification is an inevitable restriction for the bioelectricity generation of buffer-free microbial fuel cells (MFCs). In this work, acidification of the buffer-free KCl anolyte has been thoroughly eliminated through anolyte recycling. The accumulated HCO3− concentration in the recycled KCl anolyte was above 50mM, which played as natural buffer and elevated the anolyte pH to above 8. The maximum power density (Pmax) increased from 322.9mWm−2 to 527.2mWm−2, which is comparable with the phosphate buffered MFC. Besides Geobacter genus, the gradually increased anolyte pH and conductivity induced the growing of electrochemically active Geoalkalibacter genus, in the anode biofilm. Anolyte recycling is a feasible strategy to strengthen the self-buffering capacity of buffer-free MFCs, thoroughly eliminate the anolyte acidification and prominently enhance the electric power.
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abstract•Anolyte recycling enhanced HCO3− accumulation in the buffer-free anolyte.•Anolyte recycling eliminated the anolyte acidification in buffer-free MFC.•Anolyte recycling dramatically improved the electric power of buffer-free MFC.•Anolyte recycling induced the growth of Geoalkalibacter genus in anode biofilm. Anolyte acidification is an inevitable restriction for the bioelectricity generation of buffer-free microbial fuel cells (MFCs). In this work, acidification of the buffer-free KCl anolyte has been thoroughly eliminated through anolyte recycling. The accumulated HCO3− concentration in the recycled KCl anolyte was above 50mM, which played as natural buffer and elevated the anolyte pH to above 8. The maximum power density (Pmax) increased from 322.9mWm−2 to 527.2mWm−2, which is comparable with the phosphate buffered MFC. Besides Geobacter genus, the gradually increased anolyte pH and conductivity induced the growing of electrochemically active Geoalkalibacter genus, in the anode biofilm. Anolyte recycling is a feasible strategy to strengthen the self-buffering capacity of buffer-free MFCs, thoroughly eliminate the anolyte acidification and prominently enhance the electric power.
pubElsevier Ltd
doi10.1016/j.biortech.2017.08.073
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date2017-11