Testing of Bacteria Gluconobacter oxydans and Electron Transport Mediators Composition for Application in Biofuel Cell
✍ Scribed by Anatoly Reshetilov; Sergey Alferov; Ludmila Tomashevskaya; Ol'ga Ponamoreva
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 126 KB
- Volume
- 18
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
Abstract
The dependence of EMF, current and voltage at a fixed load, and the fuel cell inner resistance on anolyte composition has been studied using microbial fuel cell (MFC) model. Strain Gluconobacter oxydans subsp. industrius VKM B‐1280 was a biocatalyst; glucose was used as a fuel. The following anolyte compositions were considered: (1) water‐soluble mediator 2,6‐dichlorophenol indophenol (DCPIP) in combination with suspension and immobilized bacteria and (2) hydrophobic mediators ferrocene and 1,1′‐dimethylferrocene in combination with immobilized bacteria. It was shown that DCPIP in combination with immobilized bacteria versus the cell suspension increases the generated EMF for 36%, current for 25%, power for 56%, and inner resistance for 14%. Ferrocene seems to be more preferable as compared with 1,1′‐dimethylferrocene. Ferrocene gives higher values of the generated EMF (for 8%) and current (for 47%), as well as decreases the inner resistance of MFC for 38%. The proposed system can be used for rapid qualitative and quantitative assessment of the “fuel‐cell‐mediator‐electrode” interaction under charge transfer and is used in the search of effective anolyte compositions.