期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 91, 期 -, 页码 220-230出版社
ELSEVIER
DOI: 10.1016/j.bej.2014.08.007
关键词
Butanol; Fermentation; Carbohydrates; Growth kinetics; Production kinetics; Microalgae
资金
- Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [HCK201205]
- National Natural Science Foundation of China [51008105, 51121062]
- Academician Workstation Construction in Guang-dong Province [2012B090500018]
- Taiwan's Ministry of Science and Education (MOST) [103-2221-E-006-190-MY3, 103-3113-E-006-006]
Our recent work showed that Chlorella vulgaris JSC-6 can accumulate over 50% carbohydrates per dry weight, which mainly contain glucose and xylose as the monosaccharides. In this study, synthetic mixed sugars simulating the hydrolyzed biomass of C. vulgaris JSC-6 (primarily containing glucose and xylose at a ratio of 5:1-6.5:1) was used as the carbon source for bio-butanol production with Clostridium acetobutylicum ATCC824. The growth and product formation kinetics based on glucose, xylose, and mixtures of the two sugars were determined using Monod-type and Michaelis-Menten models, respectively. C. acetobutylicum ATCC824 can grow faster and produce butanol more efficiently on glucose, while the performance was markedly poorer when using xylose. The butanol production kinetics were quite similar when using glucose alone or using mixed sugars (glucose to xylose ratio = 5:1 or 6.5:1), resulting in a maximum butanol production rate of 0.89-0.93 g/h/L. This work demonstrated the feasibility of using the microalgae-based carbohydrates as the feedstock for biobutanol production with C. acetobutylicum ATCC824. (C) 2014 Elsevier B.V. All rights reserved.
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