Mixed-culture H2 fermentation performance and the relation between microbial community composition and hydraulic retention times for a fixed bed reactor fed with galactose/glucose mixtures
메타 데이터
바이오화학분류
바이오정밀화학
연료
논문
Mixed-culture H2 fermentation performance and the relation between microbial community composition and hydraulic retention times for a fixed bed reactor fed with galactose/glucose mixtures
학술지
Journal of bioscience and bioengineering
저자명
Anburajan, P.; Park, J.H.; Sivagurunathan, P.; Pugazhendhi, A.; Kumar, G.; Choi, C.S.; Kim, S.H.
초록
<P>This study examined the mesophilic continuous biohydrogen fermentation from galactose and glucose mixture with an initial substrate concentration of 15 g/L (galactose 12 g/L and glucose 3 g/L) as a resembling carbon source of pre-treated red algal hydrolyzate. A fixed bed reactor was fed with the sugar mixture at various hydraulic retention times (HRTs) ranging 12 to 1.5 h. The maximum hydrogen production rate of 52.6 L/L-d was found at 2 h HRT, while the maximum hydrogen yield of 2.3 +/- 0.1 mol/mol hexose(added), was achieved at 3 h HRT. Microbial communities and species distribution were analyzed via quantitative polymerase chain reaction (qPCR) and the dominant bacterial population was found as Clostridia followed by Lactobacillus sp. Packing material retained higher 16S rRNA gene copy numbers of total bacteria and Clostridium butyricum fraction compared to fermentation liquor. The finding of the study has demonstrated that H-2 production from galactose and glucose mixture could be a viable approach for hydrogen production. (C) 2017, The Society for Biotechnology, Japan. All rights reserved.</P>
발행연도
2017
발행기관
Society for Bioscience and Bioengineering, Japan ; Distributed outside Japan by Elsevier Science