Abstract
Biofuel cell is a device generating electrical energy by using microorganism. The driving force of a biofuel cell is the redox reaction of substrate such as glucose by using microorganism as the catalyst In this paper a biofuel cell device is presented by using Saccharomyces cerevisiae baker’s yeast as microorganism. A fairly large power output (120 μW/cm3) was obtained by using nickel net packing with graphite particles as the anode electrode. The cell can be run in batch, fed-batch, or continuous mode. Experiments indicate that yeast fermentation broth includes large amount of electroactive substances which can be utilized in the anode without the aid of mediators. An electro-biological model is proposed from the results of theoretical and experimental analysis.
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