Improving enzymatic hydrolysis effect of herb residue by deep eutectic solvent pretreatment

被引：0
|
作者：
Xie X. [1 ]
Liu Y. [1 ]
Yu Q. [2 ]
Zhang Y. [2 ]
Zhang R. [1 ]
Qiu Y. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi'an
[2] Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 03期
关键词：
Deep eutectic solvent; Enzymatic hydrolysis; Fractal-like kinetics; Herb residue; Pretreatment;
D O I：
10.16085/j.issn.1000-6613.2021-1764
中图分类号：
学科分类号：
摘要：
In recent years, deep eutectic solvent (DES) has attracted extensive attention in biomass pretreatment owing to its advantages of easy preparation, low cost and easy recovery. In this study, DES was synthesized with choline chloride as hydrogen bond receptor and ethanolamine as hydrogen bond donor. The effects of pretreatment conditions of different temperature, time and solid-liquid ratio on the components and enzymatic hydrolysis of herb residue were studied. The results showed that, the lignin removal rate was 78.42% and the cellulose recovery rate was 83.89% after pretreatment at 120℃ for 4 hours with the solid-liquid ratio of 1:20. After 96 hours of enzymatic hydrolysis, it was found that the enzymatic hydrolysis efficiency of the substrate under the optimal conditions was 78.57%, which was 1.58 times higher than that of untreated herb residue(30.40%). Fractal like kinetic analysis showed that the pretreatment temperature had the greatest impact on the enzymatic hydrolysis effect. SEM, XRD and FTIR analysis showed that the changes of substrate morphology, crystallization index and functional group after pretreatment were conducive to the improvement of enzymatic hydrolysis effect. © 2022, Chemical Industry Press Co., Ltd. All right reserved.
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页码：1349 / 1356
页数：7
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