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Process integration for ethanol production from corn and corn stover as mixed substrates
- Yu, Jianming, Xu, Zhaoxian, Liu, Lei, Chen, Sitong, Wang, Shengwei, Jin, Mingjie
- Bioresource technology 2019 v.279 pp. 10-16
- corn, corn stover, ethanol, ethanol production, fermentation, hydrolysates, hydrolysis, liquefaction, mixing, saccharification
- This work investigated all possible process integration strategies for ethanol production from corn and dilute acid pretreated corn stover (CS) as mixed substrates. Three corn to pretreated CS ratios (20%:10%, 10%:20% and 5%:25%) were examined. When the ratio of corn to pretreated CS was 20%:10%, the process integration strategy that mixed corn with CS hydrolysate for liquefaction followed by SSF resulted in the highest ethanol titer of 99.3 g/L. Mixing liquefied corn with pretreated CS for hydrolysis/saccharification followed by fermentation was the best strategy for the other two ratios. The strategy of mixing liquefied corn with pretreated CS for 6 h hydrolysis followed by fermentation showed the highest productivity for all the tested ratios.