Optimizing Acid Hydrolysis of Jerusalem Artichoke-Derived Inulin for Fermentative Butanol Production
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- 作者：Tahereh Sarchami ; Lars Rehmann
- 关键词：Jerusalem artichoke ; Inulin ; Acid hydrolysis ; Optimization ; Response surface methodology (RSM) ; ABE fermentation
- 刊名：BioEnergy Research
- 出版年：2015
- 出版时间：September 2015
- 年：2015
- 卷：8
- 期：3
- 页码：1148-1157
- 全文大小：447 KB
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26.Zhang - 作者单位：Tahereh Sarchami (1)
Lars Rehmann (1)
1. Department of Chemical and Biochemical Engineering, University of Western Ontario, 1151 Richmond Street, London, ON, N6A 3K7, Canada - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Biomaterials
Biochemical Engineering
Bioorganic Chemistry - 出版者：Springer New York
- ISSN：1939-1242
文摘
In this study, a central composite design and response surface methodology were used to study the effect of various hydrolysis variables (temperature, pH, and time) on the acid hydrolysis of Jerusalem artichoke-derived inulin using three different mineral acids (HCl, H2SO4, and H3PO4). Numerical optimization was used to maximize the sugar yield of Jerusalem artichoke powder within the experimental range for each of the mentioned acid. The influence of each acid on the formation of hydroxymethylfurfural (HMF; a known by-product and inhibitor for fermentative organisms) was also investigated. H2SO4 was found to have a better potential for sugar yields compared to two other acids (HCl and H3PO4) since it can hydrolyze the highest amount of inulin (98.5 %) under optimal conditions (temperature of 97 °C, pH of 2.0, and time period of 35 min) without producing inhibiting HMF concentrations. The sulfuric hydrolysate of Jerusalem artichoke was fermented via solventogenic clostridia to acetone-butanol-ethanol (ABE). An ABE yield of 0.31 g g? and an overall fermentation productivity of 0.25 g l? h? were obtained, indicating the suitability of this feedstock for fermentative ABE production. Keywords Jerusalem artichoke Inulin Acid hydrolysis Optimization Response surface methodology (RSM) ABE fermentation