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Bioresour Technol. 2019 May;279:10-16. doi: 10.1016/j.biortech.2019.01.112. Epub 2019 Jan 24.

Process integration for ethanol production from corn and corn stover as mixed substrates.

Author information

1
School of Environmental and Biological Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China.
2
Jiangsu Huating Biotechnology Co., Ltd., 228 Xingang South Road, Xinyi Economic Development District, Xinyi, Jiangsu 221400, China.
3
School of Environmental and Biological Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China. Electronic address: jinmingjie@njust.edu.cn.

Abstract

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.

KEYWORDS:

Cellulosic ethanol; Corn ethanol; Integrated ethanol production process; The first generation ethanol; The second generation ethanol

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