Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7067795 | Bioresource Technology | 2018 | 6 Pages |
Abstract
This review explores electron transfer kinetics from an electron donor to the anode in electrically conductive biofilm anodes. Intracellular electron transfer (IET) from the donor to the anode is well described with the Monod equation. In comparison, mechanisms of extracellular electron transfer (EET) conduction are unclear yet, complicating EET kinetics. However, in biofilm anodes where potential gradient to saturated current density is less than â¼300â¯mV, Ohmic conduction successfully describe conductive EET mainly with biofilm conductivity (Kbio) and biofilm thickness (Lf). High Kbio essential for production of high current density is found in Geobacter pure or enriched biofilm anodes, but other exoelectrogens could make biofilms electrically conductive. IET is rate-limiting for current density in conductive biofilms, and biofilm density of active exoelectrogens and Lf are operating parameters that can be optimized further to improve current density.
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Authors
Hyung-Sool Lee,