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A bioelectrochemical system in anaerobic digestion: stabilization and remediation

Jo De Vrieze (UGent) , Sylvia Gildemyn (UGent) , Jan Arends (UGent) , Inka Vanwonterghem, Nico Boon (UGent) , Willy Verstraete (UGent) , Gene Tyson, Tom Hennebel (UGent) and Korneel Rabaey (UGent)
Author
Organization
Project
PLANTPOWER (PlantPower - Living plants in microbial fuel cells for clean, renewable, sustainable, efficient, in-situ bioenergy production)
Abstract
Anaerobic digestion (AD) is an established technology for energy recovery from complex organic waste. Excessive organic loading or influent salinity can sometimes disrupt its functioning. In past studies, enhanced biogas production was found upon introducing a bioelectrochemical system (BES) in the anaerobic digester. Here we evaluated the impact of a BES on the anaerobic digestion of molasses. Lab-scale anaerobic digesters were operated in the presence or absence of electrodes, to evaluate the stabilizing capacity of a BES in AD. Methane production declined in the reactors without electrodes, yet remained stable in the reactors with electrodes, indicating a stabilizing effect. After 91 days of operation, the electrodes were introduced in the failing AD reactors in order to evaluate their remediating capacity. Immediately after introduction of the electrodes, methane production increased. Although a current was generated in the BES operated in closed circuit, contrarily to earlier studies which typically lacked a control, no direct effect of applied potential or current density was observed. Microbial community analysis revealed the importance of Methanosaeta sp. on the electrodes. This study demonstrated that a BES can remediate AD systems which exhibited process failure. However, the absence of a clear link between current density and electrode potential in the BES and the stability of the AD process indicates that likely biomass retention on the electrodes is the main cause of the observation.
Keywords
methane, Methanosaeta, Bioelectrochemical system, Methanosarcina, biogas

Citation

Please use this url to cite or link to this publication:

MLA
De Vrieze, Jo, Sylvia Gildemyn, Jan Arends, et al. “A Bioelectrochemical System in Anaerobic Digestion: Stabilization and Remediation.” Microbial Fuel Cells, 4th International Conference, Abstracts. 2013. Print.
APA
De Vrieze, Jo, Gildemyn, S., Arends, J., Vanwonterghem, I., Boon, N., Verstraete, W., Tyson, G., et al. (2013). A bioelectrochemical system in anaerobic digestion: stabilization and remediation. Microbial Fuel Cells, 4th International conference, Abstracts. Presented at the 4th International Microbial Fuel Cells Conference (MFC-4).
Chicago author-date
De Vrieze, Jo, Sylvia Gildemyn, Jan Arends, Inka Vanwonterghem, Nico Boon, Willy Verstraete, Gene Tyson, Tom Hennebel, and Korneel Rabaey. 2013. “A Bioelectrochemical System in Anaerobic Digestion: Stabilization and Remediation.” In Microbial Fuel Cells, 4th International Conference, Abstracts.
Chicago author-date (all authors)
De Vrieze, Jo, Sylvia Gildemyn, Jan Arends, Inka Vanwonterghem, Nico Boon, Willy Verstraete, Gene Tyson, Tom Hennebel, and Korneel Rabaey. 2013. “A Bioelectrochemical System in Anaerobic Digestion: Stabilization and Remediation.” In Microbial Fuel Cells, 4th International Conference, Abstracts.
Vancouver
1.
De Vrieze J, Gildemyn S, Arends J, Vanwonterghem I, Boon N, Verstraete W, et al. A bioelectrochemical system in anaerobic digestion: stabilization and remediation. Microbial Fuel Cells, 4th International conference, Abstracts. 2013.
IEEE
[1]
J. De Vrieze et al., “A bioelectrochemical system in anaerobic digestion: stabilization and remediation,” in Microbial Fuel Cells, 4th International conference, Abstracts, Cairns, QLD, Australia, 2013.
@inproceedings{4173437,
  abstract     = {Anaerobic digestion (AD) is an established technology for energy recovery from complex organic waste. Excessive organic loading or influent salinity can sometimes disrupt its functioning. In past studies, enhanced biogas production was found upon introducing a bioelectrochemical system (BES) in the anaerobic digester. Here we evaluated the impact of a BES on the anaerobic digestion of molasses. Lab-scale anaerobic digesters were operated in the presence or absence of electrodes, to evaluate the stabilizing capacity of a BES in AD. Methane production declined in the reactors without electrodes, yet remained stable in the reactors with electrodes, indicating a stabilizing effect. After 91 days of operation, the electrodes were introduced in the failing AD reactors in order to evaluate their remediating capacity. Immediately after introduction of the electrodes, methane production increased. Although a current was generated in the BES operated in closed circuit, contrarily to earlier studies which typically lacked a control, no direct effect of applied potential or current density was observed. Microbial community analysis revealed the importance of Methanosaeta sp. on the electrodes. This study demonstrated that a BES can remediate AD systems which exhibited process failure. However, the absence of a clear link between current density and electrode potential in the BES and the stability of the AD process indicates that likely biomass retention on the electrodes is the main cause of the observation.},
  author       = {De Vrieze, Jo and Gildemyn, Sylvia and Arends, Jan and Vanwonterghem, Inka and Boon, Nico and Verstraete, Willy and Tyson, Gene and Hennebel, Tom and Rabaey, Korneel},
  booktitle    = {Microbial Fuel Cells, 4th International conference, Abstracts},
  keywords     = {methane,Methanosaeta,Bioelectrochemical system,Methanosarcina,biogas},
  language     = {eng},
  location     = {Cairns, QLD, Australia},
  title        = {A bioelectrochemical system in anaerobic digestion: stabilization and remediation},
  year         = {2013},
}