Title

Effect of furans and linoleic acid on hydrogen production

Document Type

Article

Publication Date

2013

Publication Title

International Journal of Hydrogen Energy

Volume

38

Issue

28

First Page

12283

Last Page

12293

DOI

dx.doi.org/10.1016/j.ijhydene.2013.07.035

Keywords

Bio-hydrogen, Mixed anaerobic culture, Linoleic acid, Furfural, 5-Hydroxymethyl furfural, Microbial diversity

Abstract

The effects of furans (furfural and 5-hydroxymethylfurfural (HMF)) on hydrogen (H2) production using mixed anaerobic cultures were evaluated by conducting batch experiments. Two mixed anaerobic cultures (culture A and B) fed furans plus glucose and treated with and without linoleic acid (LA) at pH 5.5 were maintained at 37 °C. In the LA inhibited cultures A and B fed 0.75 g L−1 furfural and 0.25 g L−1 HMF, the maximum H2 yields observed were 1.89 ± 0.27 mol mol−1 glucose and 1.75 ± 0.22 mol mol−1 glucose, respectively. In cultures with maximum H2 yields, Clostridium sp. and Flavobacterium sp. were dominant. Acetate, butyrate and ethanol were the major soluble metabolites detected in cultures A and B whereas propionate was also dominant in culture B. A canonical correspondence analysis based on the byproducts and the relative abundance of the terminal-restriction fragments revealed less variation between cultures treated with LA and low correlation value between the factors and the species composition.