Hydrogen production from propionate by Rhodopseudomonas capsulata.
Hydrogen production from propionate at various concentrations by Rhodopseudomonas capsulata, a purple nonsulfur bacterium, was studied at a temperature of 31 degrees C, a pH of 7.0, and an illumination intensity of 3000 Lux. Among the six levels of propionate, 3.84 g/L was found to be the optimum propionate concentration for H2 production in terms of substrate utilization efficiency, H2 percentage, cumulative H2 production, and H2 yield. A modified Gompertz equation was able to describe properly the production of H2 from propionate. A comparative study of H2 production with acetate, propionate, and butyrate at 40 mM showed that, as a substrate for H2 production by R. capsulata, propionate was better than butyrate, but less favorable than acetate.
Laboratory of Environmental Biotechnology, Department of Chemistry, University of Science & Technology of China, Hefei, Anhui, 230026, China.
Xian-Yang
XY
Shi
Han-Qing
HQ
Yu
D019342:Acetic Acid / Q000378:metabolism; D020148:Butyric Acid / Q000378:metabolism; D006859:Hydrogen / Q000737:chemistry / Q000378:metabolism*; D011422:Propionates / Q000737:chemistry / Q000378:metabolism*; D016354:Rhodobacter capsulatus / Q000378:metabolism*; D012970:Sodium Glutamate / Q000378:metabolism
D011422:Propionates; D020148:Butyric Acid; D006859:Hydrogen; C029658:propionic acid; D019342:Acetic Acid; D012970:Sodium Glutamate