Resumo

MORA COLLAZOS, Alexander  e  BRAVO MONTANO, Enrique. Evaluation of the Electrogenic Potential of Coastal Sediments of La Azufrada Beach, Gorgona Island. rev. cienc. [online]. 2017, vol.21, n.1, pp.11-20. ISSN 0121-1935.  https://doi.org/10.25100/rc.v21i1.6341.

The present exploratory work evaluated the electrogenic response of shore sediments collected on La Azufrada Beach in Gorgona Island. It was compared with the electrogenic response of mud and water from the micro-station lake of the Department of Biology of the Melendez University of Valle Campus. The substrates were evaluated in Microbial fuel cells (MFC) through power density curves. The environmental substrates were used as inoculated and only energetic substrate. Scanning electron microscope was performed on the anodes of the MFC at the end of the trials. Values of maximum power density of 3.1 mW/m2 were reported on the 19th day of operation for the case of the MFC feed with lake sediments and a maximum power density of 0.67 mW/m2 was reported on the 15th day for the case of marine sediments. Electron microscopic observations showed differences in the formation of incipient bio-film. The results suggested that the collected marine sediments present electrogenic activity which opens the possibility to perform studies on the electrogenic bacterial populations and the applications the MFC could have in those environments.

Palavras-chave : marine sediments; electro-chemical performance; micro-biotic fuel cells.

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