Biological denitrification driven by microbial fuel cells

Clauwaert, P., Rabaey, K., Aelterman, P., De Schamphelaire, L., The Pham, H., Boeck, P., Boon, N. and Verstraete, W. (2007) Biological denitrification driven by microbial fuel cells. Environmental Science & Technology, 41 9: 3354-3360. doi:10.1021/es062580r

Author Clauwaert, P.
Rabaey, K.
Aelterman, P.
De Schamphelaire, L.
The Pham, H.
Boeck, P.
Boon, N.
Verstraete, W.
Title Biological denitrification driven by microbial fuel cells
Journal name Environmental Science & Technology   Check publisher's open access policy
ISSN 0013-936X
Publication date 2007
Sub-type Article (original research)
DOI 10.1021/es062580r
Volume 41
Issue 9
Start page 3354
End page 3360
Total pages 7
Place of publication Washington, D.C.
Publisher American Chemical Society
Collection year 2008
Language eng
Subject C1
291199 Environmental Engineering not elsewhere classified
779999 Other
Abstract Microbial fuel cells (MFCs) that remove carbon as well as nitrogen compounds out of wastewater are of special interest for practice. We developed a MFC in which microorganisms in the cathode performed a complete denitrification by using electrons supplied by microorganisms oxidizing acetate in the anode. The MFC with a cation exchange membrane was designed as a tubular reactor with an internal cathode and was able to remove up to 0.146 kg NO3--N m(-3) net cathodic compartment (NCC) d(-1) (0.080 kg NO3--N m(-3) total cathodic compartment d(-1) (TCC)) at a current of 58 A m(-3) NCC (32 A m(-3) TCC) and a cell voltage of 0.075 V. The highest power output in the denitrification system was 8 W m(-3) NCC (4 W m(-3) TCC) with a cell voltage of 0.214 V and a current of 35 A m(-3) NCC. The denitrification rate and the power production was limited by the cathodic microorganisms, which only denitrified significantly at a cathodic electrode potential below 0 V versus standard hydrogen electrode (SHE). This is, to our knowledge, the first study in which a MFC has both a biological anode and cathode performing simultaneous removal of an organic substrate, power production, and complete denitrification without relying on H-2-formation or external added power.
Keyword Engineering, Environmental
Environmental Sciences
Biofilm-electrode Reactor
Anaerobic Respiration
Oxygen Reduction
Water Treatment
Q-Index Code C1
Q-Index Status Confirmed Code

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Created: Tue, 18 Mar 2008, 21:22:06 EST by Suzanne Read on behalf of Advanced Water Management Centre