The impact of H2 consumption, by homoacetogens, on the overall hydrogen yield in mixed culture fermentation is the focus of this study. Batch reactors were used to test the ability of anaerobic digested sludge, heat treated to eliminate methanogens, to produce and consume molecular hydrogen. The measured average hydrogen production rate from 4.2 g glucose/L was 44 ± 4 mmol H2/L sludge · d, while the H2 consumption rate varied much more, in the range from 4 to 62 mmol H2/L sludge · d. Hydrogen consumption rate depends on acetic acid concentration, headspace H2 partial pressure and mass transfer rates. Different but relatively long lag-phases for hydrogen consumption were observed. It is concluded that homoacetogenesis can have a significant negative effect on bio-H2 production by mixed cultures, limiting the possibilities for sustainable solutions.
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Research Article|
April 01 2011
H2 consumption by anaerobic non-methanogenic mixed cultures
C. Dinamarca;
1Institute of Process, Energy and Environmental Technology, Telemark University College. Kjølnes Ring 56, 3918 Porsgrunn, Norway
E-mail: [email protected]
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M. Gañán;
M. Gañán
1Institute of Process, Energy and Environmental Technology, Telemark University College. Kjølnes Ring 56, 3918 Porsgrunn, Norway
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J. Liu;
J. Liu
1Institute of Process, Energy and Environmental Technology, Telemark University College. Kjølnes Ring 56, 3918 Porsgrunn, Norway
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R. Bakke
R. Bakke
1Institute of Process, Energy and Environmental Technology, Telemark University College. Kjølnes Ring 56, 3918 Porsgrunn, Norway
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Water Sci Technol (2011) 63 (8): 1582–1589.
Citation
C. Dinamarca, M. Gañán, J. Liu, R. Bakke; H2 consumption by anaerobic non-methanogenic mixed cultures. Water Sci Technol 1 April 2011; 63 (8): 1582–1589. doi: https://doi.org/10.2166/wst.2011.214
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