A sandwiched denitrifying biocathode in a microbial fuel cell for electricity generation and waste minimization

A. Al-Mamun, O. Lefebvre, M. S. Baawain, H. Y. Ng

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A denitrifying biocathode in a microbial fuel cell was developed to investigate the replacement of the costly Pt-coated abiotic cathodes for electricity generation. The denitrifying biocathode was sandwiched between the dual-anode systems. The study investigated the performance for simultaneous treatment of wastewater on the anode, biological denitrification on the cathode and the potential recovery of electrical energy. Autotrophic biofilms performed denitrification on the cathode using supplied electrons by the biodegradation of organics on the anode. Graphite granules were used as electrodes for biofilm attachment, and nafion membranes were used as separators between electrodes. The system achieved a volumetric power of 7 ± 0.4 W m−3 net cathodic compartment (NCC) with the simultaneous removal of 229.5 ± 18 mg L−1 COD on anode and 88.9 g m−3 NCC day−1 nitrogen on cathode, respectively. The columbic efficiency for cathodic and anodic reactions was 98.9 ± 0.57 and 23.54 ± 0.87 %, respectively. This is a combined study for domestic wastewater treatment and biological denitrification in a compact MFC reactor. Further optimization of the system is desired to improve its performance and applicability.

Original languageEnglish
Pages (from-to)1055-1064
Number of pages10
JournalInternational Journal of Environmental Science and Technology
Volume13
Issue number4
DOIs
Publication statusPublished - Apr 1 2016

Fingerprint

Bioelectric Energy Sources
microbial fuel cells
Microbial fuel cells
Electricity
electricity generation
electricity
fuel cell
denitrification
Denitrification
Anodes
Electrodes
Cathodes
biofilm
electrodes
electrode
Biofilms
separators
sewage treatment
system optimization
wastewater treatment

Keywords

  • Autotrophic biofilms
  • Biocathode
  • Bioelectricity production
  • Biological denitrification
  • Microbial electrochemistry
  • Microbial fuel cell

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Environmental Chemistry
  • Environmental Engineering

Cite this

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abstract = "A denitrifying biocathode in a microbial fuel cell was developed to investigate the replacement of the costly Pt-coated abiotic cathodes for electricity generation. The denitrifying biocathode was sandwiched between the dual-anode systems. The study investigated the performance for simultaneous treatment of wastewater on the anode, biological denitrification on the cathode and the potential recovery of electrical energy. Autotrophic biofilms performed denitrification on the cathode using supplied electrons by the biodegradation of organics on the anode. Graphite granules were used as electrodes for biofilm attachment, and nafion membranes were used as separators between electrodes. The system achieved a volumetric power of 7 ± 0.4 W m−3 net cathodic compartment (NCC) with the simultaneous removal of 229.5 ± 18 mg L−1 COD on anode and 88.9 g m−3 NCC day−1 nitrogen on cathode, respectively. The columbic efficiency for cathodic and anodic reactions was 98.9 ± 0.57 and 23.54 ± 0.87 {\%}, respectively. This is a combined study for domestic wastewater treatment and biological denitrification in a compact MFC reactor. Further optimization of the system is desired to improve its performance and applicability.",
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AU - Baawain, M. S.

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