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Biomass Conversion and Biorefinery
Published in: Biomass Conversion and Biorefinery 5/2024

03-05-2022 | Original Article

Process optimization for acidic deep eutectic solvent pretreatment of corn stover to enhance enzymatic saccharification

Authors: Tian-Jie Ao, Kai Li, Muhammad Aamer Mehmood, Xin-Qing Zhao, Feng-Wu Bai, Raj Boopathy, Chen-Guang Liu

Published in: Biomass Conversion and Biorefinery | Issue 5/2024

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Abstract

In the present study, deep eutectic solvent (DES) was employed for an effective pretreatment of recalcitrant corn stover (CS) to improve the efficiency of the subsequent saccharification process. Accordingly, the molar ratios of lactic acid (LA)/choline chloride (ChCl), temperature, and time were studied via response surface methodology to optimize pretreatment conditions. While the best cellulose and hemicelluloses digestibility (94.85%) and delignification (29.27%) efficiency were achieved using the LA/ChCl molar ratio of 1 at 140 °C after 4 h. Overall, this efficiency was nearly seven-fold higher when compared to the untreated CS. Besides, at higher temperatures (> 140 °C), the humins were generated in the pretreatment process, which might have wrapped around the surface of the pretreated CS and resulted in an impeded enzymatic accessibility. The pretreatment efficiency was also fully maintained after three repeated cycles. This study provides an insight into the comprehensive utilization of the LA/ChCl type of DES for robust lignocellulosic biomass pretreatment.

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Appendix
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Metadata
Title
Process optimization for acidic deep eutectic solvent pretreatment of corn stover to enhance enzymatic saccharification
Authors
Tian-Jie Ao
Kai Li
Muhammad Aamer Mehmood
Xin-Qing Zhao
Feng-Wu Bai
Raj Boopathy
Chen-Guang Liu
Publication date
03-05-2022
Publisher
Springer Berlin Heidelberg
Published in
Biomass Conversion and Biorefinery / Issue 5/2024
Print ISSN: 2190-6815
Electronic ISSN: 2190-6823
DOI
https://doi.org/10.1007/s13399-022-02738-0

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