1. High-efficiency conversion of corn bran to ethanol at 150 L scale.
- Author
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Dong, Jie, Fakhari, Mohamadali, Ban, Lilia, Polhemus, Krystin, Roji Shehu, Muhammed, Doustkhahvajari, Forough, Kukielski, Philip, Venigalla, Ajay, Lash, Terry, Sathitsuksanoh, Noppadon, and Zhang, Yanhong
- Subjects
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CARBOHYDRATES , *CELLULOSE , *STARCH , *LOW temperatures , *BRAN , *XYLANS - Abstract
[Display omitted] • Dilute acid pretreatment of corn bran with low temperature (90 °C for 60 min). • High sugar yields (95% for starch, 77% for both cellulose and xylan). • Highly efficient fermentation (100 % glucose and 91 % xylose conversion within 24 h). • The process was scaled up to 150-L. Fractionated corn bran was processed to maximize ethanol production from starch, cellulose, and xylan. After various bench-scale experiments, an optimized process with dilute acid pretreatment (1.5 % w/w H 2 SO 4) at 90 °C for 60 min was utilized followed by enzymatic hydrolysis using cellulase and hemicellulase for 48 hr. After simultaneous saccharification (regarding starch) and fermentation at 150 L using an engineered yeast, which consumes both glucose and xylose to make ethanol, the 86 % total sugar conversion yield was achieved, including conversions of 95 % for starch, 77 % for cellulose and 77 % for xylan. Also, an accurate mass balance was formulated for ethanol-producing carbohydrates including starch, cellulose, and xylan from feedstock to final ethanol. A highly efficient process of converting corn fiber to ethanol was successfully scaled up to 150 L. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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