Green pretreatment of Xanthoceras sorbifolia Bunge husks via hydrogen peroxide presoftening, liquid hot water pretreatment and enzymatic hydrolysis for the co-production of functional xylo-oligosaccharides and glucose

文献类型： 外文期刊

第一作者： Ma, Kedong

作者： Ma, Kedong;Li, Guo;Cui, Yubo;Li, Jie;He, Mingxiong;Ruan, Zhiyong

作者机构：

关键词： Lignocellulosic biomass; Xylo-oligosaccharides; Hydrogen peroxide; Liquid hot water pretreatment; Enzymatic hydrolysis

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.2； 五年影响因子：6.2 ）

ISSN： 0926-6690

年卷期： 2025 年 223 卷

页码：

收录情况： SCI

摘要： Xanthoceras sorbifolia Bunge husks (XSH), a by-product of industrial production, are rich in cellulose, hemicellulose and lignin. The aim of this study was to use XSH as a new type of lignocellulosic feedstock to co-produce high yields of xylo-oligosaccharides (XOS) and glucose via an integrated biorefinery process including hydrogen peroxide presoftening, i.e., H2O2-assisted hydrothermal pretreatment (HHP), liquid hot water (LHW) treatment and enzymatic hydrolysis (EH). The HHP1st-LHW treatment resulted in high selectivity toward hemicellulose, with a minor influence on cellulose and lignin. The maximum XOS (X2-X6) yield of 58.5 % was achieved under optimal conditions, in which the desired functional XOS (X2-X4) was 81.4 %, representing 10.5 g per 100 g of XSH. Moreover, HHP2nd-assisted enzymatic hydrolysis resulted in nearly full degradation of cellulose, and a 102.9 g/L glucose titer corresponding to 95.3 % of the glucose yield was produced via the addition of 10 % glucan (>= 15 % solid loading). Mass balance analysis revealed that 12.9 g of XOS, 38.3 g of glucose and 14.2 g of lignin were produced from 100 g of XSH. These results demonstrated the great potential of XSH as a renewable biomass for high value-added biochemical production. The proposed combined pretreatment method is an environmentally friendly and effective process to for co-produce high yields of desirable XOS, fermentable sugars and native-like lignin.

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