Hydrogen production in anaerobic and microaerobic Thermotoga neapolitana |
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Authors: | Niels T. Eriksen Thomas M. Nielsen Niels Iversen |
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Affiliation: | Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 49, Aalborg 9000, Denmark. nte@bio.aau.dk |
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Abstract: | We have tested the hypothesis (Van Ooteghem et al. Appl Biochem Biotechnol 2002 98–100: 177–189) that microaerobic metabolism may increase the yield of H2 from the thermophilic bacterium Thermotoga neapolitana. In anaerobic conditions, T. neapolitana converted glucose into acetic acid and lactic acid and yielded 2.4 ± 0.3 mol H2 mol−1 glucose. The bacterium tolerated low O2 partial pressures but the H2 yield was not improved under microaerobic conditions. Our results indicate that T. neapolitana only produces H2 by anaerobic metabolism, and that the yield of H2 can be maximised by minimising the production of lactic acid. |
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Keywords: | Batch culture Biohydrogen Glucose Oxygen Thermotoga neapolitana |
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