Bioreactor for glycerol conversion into H2 by bacterium Enterobacter aerogenes |
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Authors: | Sergei A Markov Jared AverittBarbara Waldron |
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Affiliation: | Biology Department, SSC A225, Austin Peay State University, P.O. Box 4718, Clarksville, TN 37041, USA |
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Abstract: | Glycerol was used as a substrate for H2 production by bacterium Enterobacter aerogenes in the test tubes and bioreactor. A BioFlo/CelliGen 115 bioreactor (10 L working volume) was utilized to conduct the experiments for conversion of glycerol into H2 by E. aerogenes cells. The highest H2 production rate was observed under 2% glycerol in the culture medium. The glycerol uptake efficiency by bacteria in the bioreactor was found to be 65% during the 6 day period, matching glycerol uptake efficiency observed in the test tubes experiment (65%).Hydrogen production from glycerol (2% glycerol, v/v) by E. aerogenes in the bioreactor and test tubes was measured over the 6 days, showing the maximal H2 rate at 650 mL g−1 dry weight h−1. The yield of H2 production from glycerol at 0.89 mol/mol in the bioreactor was high, corresponding to the theoretical yield of 1 mol of H2 per 1 mol of glycerol. |
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Keywords: | Biohydrogen Glycerol Ethanol Enterobacter aerogenes Bioreactor |
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