Integration of facile deep eutectic solvents pretreatment for enhanced enzymatic hydrolysis and lignin valorization from industrial xylose residue
Integration of facile deep eutectic solvents pretreatment for enhanced enzymatic hydrolysis and lignin valorization from industrial xylose residue
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DOI：
10.1016/j.biortech.2018.06.027
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发表时间：
2018-10-01
影响因子：
11.4
通讯作者：
Xu, Feng
中科院分区：
文献类型：
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作者：
Guo, Zongwei;Ling, Zhe;Xu, Feng
本研究开发了一种新型的生物质预处理工艺，利用三种低共熔溶剂（DES）来提高糖化效率和木质素的价值。木糖渣的主要成分包括纤维素和木质素组分被释放、回收和利用。甜菜碱/乳酸体系在120 ℃预处理2 h，酶消化率显著提高（从55.3%提高到96.8%）。甜菜碱/乳酸预处理后木糖渣的脱木素效率高达81.6%，这是木糖渣结构松散、表面腐蚀的主要原因。回收的木质素具有高纯度、低分子量（630-2040 g/mol）和多分散性（1.07-1.76）。综合分析表明，一锅法DESs系统为木质纤维素原料的全组分增值提供了一条简便有效的途径。
In this study, a novel biomass pretreatment process using three kinds of deep eutectic solvents (DESs) was developed to improve saccharification efficiency and lignin valorization. The major components of xylose residue including cellulose and lignin fractions were released, recovered and utilized. Pretreatment with betaine/ lactic acid system at 120 degrees C for 2 h was found to be the optimal conditions with prominently increased enzymatic digestibility (from 55.3% to 96.8%). The efficient conversion was mainly ascribed to the significant delignification efficiency of 81.6% after betaine/lactic acid pretreatment, which caused incompact structure and corrosive surface of treated xylose residue. The recoverable lignin had high purity, low molecular weight (630-2040 g/mol) and polydispersity (1.07-1.76). Based on the comprehensive analysis, the one-pot DESs system provides us a facile and effective approach for whole components valorization of lignocellulosic materials.