Journal article
Microbial fuel cell using anaerobic respiration as an anodic reaction and biomineralized manganese as a cathodic reactant
Environmental science & technology, Vol.39(12), pp.4666-4671
06/15/2005
Handle:
https://hdl.handle.net/2376/104160
PMID: 16047807
Abstract
We have operated a microbial fuel cell in which glucose was oxidized by Klebsiella pneumoniae in the anodic compartment, and biomineralized manganese oxides, deposited by Leptothrix discophora, were electrochemically reduced in the cathodic compartment. In the anodic compartment, to facilitate the electron transfer from glucose to the graphite electrode, we added a redox mediator, 2-hydroxy-1,4-naphthoquinone. We did not add any redox mediator to the cathodic compartment because the biomineralized manganese oxides were deposited on the surface of a graphite electrode and were reduced directly by electrons from the electrode. We have demonstrated that biomineralized manganese oxides are superiorto oxygen when used as cathodic reactants in microbial fuel cells. The current density delivered by using biomineralized manganese oxides as the cathodic reactant was almost 2 orders of magnitude higher than that delivered using oxygen. Several fuel cells were operated for 500 h, reaching anodic potentials of -441.5 +/- 31 mVscE and cathodic potentials of +384.5 +/- 64 mVscE. When the electrodes were connected by a 50 Ohms resistor, the fuel cell delivered the peak power density of 126.7 +/- 31.5 mW/m2.
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Details
- Title
- Microbial fuel cell using anaerobic respiration as an anodic reaction and biomineralized manganese as a cathodic reactant
- Creators
- Allison Rhoads - Center for Biofilm Engineering and Department of Civil Engineering, Montana State University, Bozeman, Montana 59717, USAHaluk BeyenalZbigniew Lewandowski
- Publication Details
- Environmental science & technology, Vol.39(12), pp.4666-4671
- Academic Unit
- Chemical Engineering and Bioengineering, School of
- Publisher
- United States
- Identifiers
- 99900546761001842
- Language
- English
- Resource Type
- Journal article