使用三组分深共晶溶剂预处理提高竹材残余物的酶消化率。
Enhancing enzymatic digestibility of bamboo residues using a three-constituent deep eutectic solvent pretreatment.
机构信息
School of Chemical Engineering, Southwest Forestry University, Kunming 650224, PR China.
Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, PR China; School of Chemical Engineering, Southwest Forestry University, Kunming 650224, PR China.
出版信息
Bioresour Technol. 2022 Feb;346:126639. doi: 10.1016/j.biortech.2021.126639. Epub 2021 Dec 28.
A three-constituent deep eutectic solvent (3c-DES) pretreatment with choline chloride-oxalic acid-ethylene glycol was applied to examine its effectiveness on bamboo residues. The 3c-DES pretreatment can remove 91.09% xylan and significantly improved the 72 h hydrolysis yield of D. sinicus by 6.3 and 1.7 times as compared with the liquid hot water and two-constituent deep eutectic solvent (2c-DES) pretreatment. The introduction of ethylene glycol (EG) into choline chloride (ChCl)/ oxalic acid (OA) decreased the content of surface lignin and the condensation of lignin, which contributed to the increase of hydrophilic nature and cellulose accessibility in substrates. Moreover, higher glucose (85.72%) and xylose (91.05%) yields of 3c-DES pretreated bamboo were achieved with the addition of Tween 80. The 3c-DES system provides an alternative approach for the development of efficient bamboo pretreatment, and had broad space for bamboo biorefinery in southern China.
采用氯化胆碱-草酸-乙二醇组成的三组分深共熔溶剂（3c-DES）预处理竹材残渣，考察其对竹材残渣的预处理效果。与液热水和双组分深共熔溶剂（2c-DES）预处理相比，3c-DES 预处理可去除 91.09%的木聚糖，显著提高 72 h 水解产率，分别提高 6.3 倍和 1.7 倍。乙二醇（EG）的引入降低了表面木质素的含量和木质素的缩合程度，有助于提高底物的亲水性和纤维素的可及性。此外，添加 Tween 80 可使预处理竹材获得更高的葡萄糖（85.72%）和木糖（91.05%）得率。3c-DES 体系为高效竹材预处理提供了一种替代方法，为中国南方的竹材生物炼制提供了广阔的空间。
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