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Butler-Volmer-Monod model for describing bio-anode polarization curves
Hubertus V M Hamelers1, Annemiek Ter Heijne, Nienke Stein
1Sub-Department of Environmental Technology, Wageningen University, Bomenweg 2, PO Box 8129, 6700 EV Wageningen, The Netherlands. Bert.Hamelers@wur.nl
Abstract:
A kinetic model of the bio-anode was developed based on a simple representation of the underlying biochemical conversions as described by enzyme kinetics, and electron transfer reactions as described by the Butler-Volmer electron transfer kinetics. This Butler-Volmer-Monod model was well able to describe the measured bio-anode polarization curves. The Butler-Volmer-Monod model was compared to the Nernst-Monod model described the experimental data significantly better. The Butler-Volmer-Monod model has the Nernst-Monod model as its full electrochemically reversible limit. Contrary to the Nernst-Monod model, the Butler-Volmer-Monod model predicts zero current at equilibrium potential. Besides, the Butler-Volmer-Monod model predicts that the apparent Monod constant is dependent on anode potential, which was supported by experimental results.
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