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- Title
Influence of Sulfate-Reducing Bacteria on Outdoor Hydrogen Production by Photosynthetic Bacterium with Seawater.
- Authors
Maeda, Isamu; Mizoguchi, Tadashi; Miura, Yoshiharu; Yagi, Kiyohito; Shioji, Norio; Miyasaka, Hitoshi
- Abstract
The application of seawater for bacterial fermentative production is a cost-effective technology. Hydrogen production by marine photosynthetic bacterium with seawater failed to continue after more than 10 days, and was accompanied by the formation of hydrogen sulfide and a change in culture color from red to black. However, substrate consumption in the blackish culture was comparable to that in a hydrogen-producing culture. A decrease in hydrogen production occurred upon the addition of sodium sulfide at concentrations of 1.5 mM or higher. PCR analysis targeted at the 16S rDNA sequence selective for sulfate-reducing bacteria revealed the existence of sulfate-reducing bacteria in inoculation cultures of the phototrophic bacterium and medium for hydrogen production. Hence, the high sulfate concentration of seawater, the low oxidation-reduction potential under hydrogen-producing conditions, and the presence of electron donors such as acetate might promote the metabolic activities of sulfate-reducing bacteria, resulting in the deterioration of hydrogen production with seawater.
- Subjects
BACTERIA; SALINE waters; HYDROGEN; SEAWATER; PROKARYOTES; DNA
- Publication
Current Microbiology, 2000, Vol 40, Issue 3, p210
- ISSN
0343-8651
- Publication type
Article
- DOI
10.1007/s002849910042