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The anode potential regulates bacterial activity in microbial fuel cells

Peter Aelterman UGent, Stefano Freguia, Jurg Keller, Willy Verstraete UGent and Korneel Rabaey UGent (2008) APPLIED MICROBIOLOGY AND BIOTECHNOLOGY. 78(3). p.409-418
abstract
The anode potential in microbial fuel cells controls both the theoretical energy gain for the microorganisms as the output of electrical energy. We operated three reactors fed with acetate continuously at a poised anode potential of 0 (R-0), -200 (R-200) and -400 (R-400) mV versus Ag/AgCl and investigated the resulting bacterial activity. The anode potential had no influence on the start-up time of the three reactors. During a 31-day period, R-200 produced 15% more charge compared to R-0 and R-400. In addition, R-200 had the highest maximal power density (up to 199 W m(-3) total anode compartment during polarization) but the three reactors evolved to the same power density at the end of the experimental period. During polarization, only the current of R-400 levelled off at an anode potential of -300 mV versus Ag/AgCl. The maximum respiration rate of the bacteria during batch tests was also considerably lower for R (-400). The specific biomass activity however, was the highest for R-400 (6.93 g chemical oxygen demand g(-1) biomass-volatile suspended solids (VSS) d(-1) on day 14). This lowered during the course of the experiment due to an increase of the biomass concentration to an average level of 578 +/- 106 mg biomass-VSS L-1 graphite granules for the three reactors. This research indicated that an optimal anode potential of -200 mV versus Ag/AgCl exists, regulating the activity and growth of bacteria to sustain an enhanced current and power generation.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
EXTRACELLULAR ELECTRON-TRANSFER, OFF-GAS ANALYSIS, electron transfer, respiration, biomass yield, electricity, MFC, biofuel cell, GLUCOSE, NANOWIRES, BIOFUEL CELLS, EFFICIENCY, WASTE-WATER TREATMENT, ELECTRICITY-GENERATION
journal title
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
Appl. Microbiol. Biotechnol.
volume
78
issue
3
pages
409 - 418
Web of Science type
Article
Web of Science id
000253132500004
JCR category
BIOTECHNOLOGY & APPLIED MICROBIOLOGY
JCR impact factor
2.569 (2008)
JCR rank
50/144 (2008)
JCR quartile
2 (2008)
ISSN
0175-7598
DOI
10.1007/s00253-007-1327-8
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
425481
handle
http://hdl.handle.net/1854/LU-425481
date created
2008-07-02 14:21:00
date last changed
2014-01-08 15:29:25
@article{425481,
  abstract     = {The anode potential in microbial fuel cells controls both the theoretical energy gain for the microorganisms as the output of electrical energy. We operated three reactors fed with acetate continuously at a poised anode potential of 0 (R-0), -200 (R-200) and -400 (R-400) mV versus Ag/AgCl and investigated the resulting bacterial activity. The anode potential had no influence on the start-up time of the three reactors. During a 31-day period, R-200 produced 15\% more charge compared to R-0 and R-400. In addition, R-200 had the highest maximal power density (up to 199 W m(-3) total anode compartment during polarization) but the three reactors evolved to the same power density at the end of the experimental period. During polarization, only the current of R-400 levelled off at an anode potential of -300 mV versus Ag/AgCl. The maximum respiration rate of the bacteria during batch tests was also considerably lower for R (-400). The specific biomass activity however, was the highest for R-400 (6.93 g chemical oxygen demand g(-1) biomass-volatile suspended solids (VSS) d(-1) on day 14). This lowered during the course of the experiment due to an increase of the biomass concentration to an average level of 578 +/- 106 mg biomass-VSS L-1 graphite granules for the three reactors. This research indicated that an optimal anode potential of -200 mV versus Ag/AgCl exists, regulating the activity and growth of bacteria to sustain an enhanced current and power generation.},
  author       = {Aelterman, Peter and Freguia, Stefano and Keller, Jurg and Verstraete, Willy and Rabaey, Korneel},
  issn         = {0175-7598},
  journal      = {APPLIED MICROBIOLOGY AND BIOTECHNOLOGY},
  keyword      = {EXTRACELLULAR ELECTRON-TRANSFER,OFF-GAS ANALYSIS,electron transfer,respiration,biomass yield,electricity,MFC,biofuel cell,GLUCOSE,NANOWIRES,BIOFUEL CELLS,EFFICIENCY,WASTE-WATER TREATMENT,ELECTRICITY-GENERATION},
  language     = {eng},
  number       = {3},
  pages        = {409--418},
  title        = {The anode potential regulates bacterial activity in microbial fuel cells},
  url          = {http://dx.doi.org/10.1007/s00253-007-1327-8},
  volume       = {78},
  year         = {2008},
}

Chicago
Aelterman, Peter, Stefano Freguia, Jurg Keller, Willy Verstraete, and Korneel Rabaey. 2008. “The Anode Potential Regulates Bacterial Activity in Microbial Fuel Cells.” Applied Microbiology and Biotechnology 78 (3): 409–418.
APA
Aelterman, P., Freguia, S., Keller, J., Verstraete, W., & Rabaey, K. (2008). The anode potential regulates bacterial activity in microbial fuel cells. APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, 78(3), 409–418.
Vancouver
1.
Aelterman P, Freguia S, Keller J, Verstraete W, Rabaey K. The anode potential regulates bacterial activity in microbial fuel cells. APPLIED MICROBIOLOGY AND BIOTECHNOLOGY. 2008;78(3):409–18.
MLA
Aelterman, Peter, Stefano Freguia, Jurg Keller, et al. “The Anode Potential Regulates Bacterial Activity in Microbial Fuel Cells.” APPLIED MICROBIOLOGY AND BIOTECHNOLOGY 78.3 (2008): 409–418. Print.