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Closed Access item Electricity generation by microorganisms in the sediment-water interface of an extreme acidic microcosm

Authors:García-Muñoz, Juan
Amils, Ricardo
Fernández, Victor M.
de Lacey, Antonio L.
Malki, Moustafa
Keywords:Microbial fuel cells, Acidophiles, Microcosm, Electricity generation, Río Tinto
Issue Date:2011
Publisher:Hemeroteca Científica Catalana
Citation:International Immunology 14:73-81 (2011)
Abstract:The attachment of microorganisms to electrodes is of great interest for electricity generation in microbial fuel cells (MFC) or other applications in bioelectrochemical systems (BES). In this work, a microcosm of the acidic ecosystem of Río Tinto was built and graphite electrodes were introduced at different points. This allowed the study of electricity generation in the sediment/water interface and the involvement of acidophilic microorganisms as biocatalysts of the anodic and cathodic reactions in a fuel-cell configuration. Current densities and power outputs of up to 3.5 A/m2 and 0.3 W/m2 , , respectively, were measured at pH 3. Microbial analyses of the electrode surfaces showed that Acidiphilium spp., which uses organic compounds as electron donors, were the predominant biocatalysts of the anodic reactions, whereas the aerobic iron oxidizers Acidithiobacillus ferrooxidans and Leptospirillum spp. were detected mainly on the cathode surface. [Int Microbiol 2011; 14(2):73-81]
Publisher version (URL):http://www.im.microbios.org/1402/02_073_GarciaMunoz.pdf
URI:http://hdl.handle.net/10261/57825
ISSN:1139-6709
E-ISSNmetadata.dc.identifier.doi = DOI:1618-1905
Appears in Collections:(CBM) Artículos

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