Optimization of volatile fatty acid compositions for hydrogen production by Rhodopseudomonas capsulata

✍ Scribed by Xian-Yang Shi; Han-Qing Yu

• Publisher: Wiley (John Wiley & Sons)
• Year: 2005
• Tongue: English
• Weight: 190 KB
• Volume: 80
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1318

✦ Synopsis

Abstract

The effects of volatile fatty acid (VFA) compositions on the cell growth, H~2~ production rate and H~2~ yield have been investigated using mathematical models. The results show that a modified logistic model indicates that the maximum cell growth of 0.03 h^−1^ was obtained at acetate fraction of 0.571, propionate 0.143 and butyrate 0.286 in the total amount of VFA. The response surface methodology appears to be a useful approach to select appropriate substrate compositions for H~2~ production. Under the conditions in this work, the fractions of 0.551–0.566 for acetate, 0.204–0.211 for propionate, and 0.230–0.238 for butyrate were optimal for H~2~ production by Rhodopseudomonas capsulata. Copyright © 2005 Society of Chemical Industry