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Kinetics of biological hydrogen production by the photosynthetic bacterium Rhodobacter sphaeroides O.U. 001
Date
2003-04-01
Author
Koku, Harun
Gündüz, Ufuk
Türker, Lemi
Metadata
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The kinetics and the effects of various parameters on hydrogen production by Rhodobacter sphaeroides O.U. 001 were investigated in a batch column photobioreactor. In particular, the effect of the inoculum age and the implementation of a light-dark cycle illumination scheme for emulating natural sunlight have been investigated in detail. The possibility of using yeast extract to replace the rather expensive vitamin mixture in the medium was also studied. The results show that hydrogen production is decreased when the initially inoculated bacteria have a high culture age. Exposure of the bacterial culture to light-dark cycles increased the amount of hydrogen compared to continuous illumination, all other parameters remaining the same. Similarly, the use of yeast extract to replace the vitamins increased the growth and hydrogen production rates, however, with a slight reduction in the total amount of gas produced and the hydrogen fraction in the evolved gas. (C) 2002 International Association for Hydrogen Energy.
Subject Keywords
Hydrogen production
,
Photosynthetic bacteria
,
Rhodobacter sphaeroides
,
Growth kinetics
,
Malate consumption
URI
https://hdl.handle.net/11511/32031
Journal
International Journal of Hydrogen Energy
DOI
https://doi.org/10.1016/s0360-3199(02)00080-0
Collections
Graduate School of Natural and Applied Sciences, Article
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Continuous hydrogen production by Rhodobacter sphaeroides O.U.001
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Rhodobacter capsulatus is purple non-sulfur (PNS) bacterium which can produce hydrogen and CO2 by utilizing volatile organic acids in presence of light under anaerobic conditions. Photofermentation by PNS bacteria is strongly affected by temperature and light intensity. In the present study we present the kinetic analysis of growth, hydrogen production, and dual consumption of acetic acid and lactic acid at different temperatures (20, 30 and 38 degrees C) and light intensities (1500, 2000, 3000, 4000 and 50...
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H. Koku, U. Gündüz, and L. Türker, “Kinetics of biological hydrogen production by the photosynthetic bacterium Rhodobacter sphaeroides O.U. 001,”
International Journal of Hydrogen Energy
, pp. 381–388, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32031.