Journal
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
Volume 13, Issue 5, Pages 1000-1013Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.rser.2008.03.003
Keywords
Anaerobic; Consortia; Hydrogen; Hydrogenases; Immobilized-cells; Inhibition; Methanogenesis; Solventogenesis
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In this work, H-2 production by anaerobic mixed cultures was reviewed. First, the different anaerobic microbial communities that have a direct relation with the generation or consumption of H-2 are discussed. Then, the different methods used to inhibit the H-2-consuming bacteria are analyzed (mainly in the methanogenesis phase) such as biokinetic control (low pH and short hydraulic retention time), heat-shock treatment and chemical inhibitors along with their advantages/disadvantages for their application on an industrial scale. After that, biochemical pathways ofcarbohydrate degradation to H-2, organic acids and solvents are showed. Fourth, structure. diversity and dynamics of H-2-producers communities are detailed. Later, the hydrogenase structure and activity is related with H-2 production. Also, the causes for H-2 production inhibition are analyzed along with strategies to avoid it. Finally, immobilized-cells systems are presented as a way to enhance H-2 production. (C) 2008 Elsevier Ltd. All rights reserved.
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