State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China.
Bioresour Technol. 2019 Oct;290:121775. doi: 10.1016/j.biortech.2019.121775. Epub 2019 Jul 8.
A novel pretreatment using organic acid synergism with deep eutectic solvents (DESs) was developed to the co-production of oligosaccharides, especially for the functional oligosaccharides, and enhancement of corn straws enzymatic saccharification. It was found that lactic acid (Lac) pretreatment combined with choline chloride/Lac system could not only selectively convert the hemicellulose to xylo-oligosaccharides (XOS), which account for 89.7% of total xylose in prehydrolysate (the functional XOS (DP < 5) took up about 35%), but also significantly promote the glucose release (33.2 g/100 g material) and well lignin separation (representing 40.9% in whole process), which better than the single organic pretreatment at higher modified severity index (SI). Structural features of various solids were characterized to better comprehend how hemicellulose and lignin removal influenced enzymatic hydrolysis. This work offered the mild and potential method to co-produce fermentable sugars with the effective separation and valorization of lignin.
开发了一种使用有机酸协同深共熔溶剂（DESs）的新型预处理方法，用于寡糖的联产，特别是功能性寡糖的联产，以及提高玉米秸秆的酶解糖化效率。研究发现，乳酸（Lac）预处理与氯化胆碱/Lac 体系结合不仅可以选择性地将半纤维素转化为木二糖（XOS），占预水解物中总木糖的 89.7%（功能性 XOS（DP<5）约占 35%），而且还可以显著促进葡萄糖的释放（33.2 g/100 g 原料）和良好的木质素分离（整个过程中代表 40.9%），优于在更高的改性严重度指数（SI）下的单一有机预处理。对各种固体的结构特征进行了表征，以更好地理解半纤维素和木质素去除如何影响酶解。这项工作提供了一种温和且有潜力的方法，可以在有效分离和增值木质素的同时联产可发酵糖。
