Journal
BIORESOURCE TECHNOLOGY
Volume 116, Issue -, Pages 86-91Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.04.019
Keywords
Bio-battery; Microbial fuel cell; Biomass; Off-grid lighting; Bio-electricity
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Terracotta pots were converted into simple, single chamber, air-cathode bio-batteries. This bio-battery design used a graphite-felt anode and a conductive graphite coating without added catalyst on the exterior as a cathode. Bacteria enriched from river sediment served as the anode catalyst. These batteries gave an average OCV of 0.56 V +/- 0.02, a Coulombic efficiency of 21 +/- 5%, and a peak power of 1.06 mW +/- 0.01(33.13 mW/m(2)). Stable current was also produced when the batteries were operated with hay extract in salt solution. The bacterial community on the anode of the batteries was tested for air tolerance and desiccation resistance over a period ranging from 2 days to 2 weeks. The results showed that the anode community could survive complete drying of the electrolyte for several days. These data support the further development of this technology as a potential power source for LED-based lighting in off-grid, rural communities. (C) 2012 Elsevier Ltd. All rights reserved.
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