Enhancing fermentable sugar production from sugarcane bagasse through surfactant-assisted ethylene glycol pretreatment and enzymatic hydrolysis: Reduced temperature and enzyme loading

文献类型： 外文期刊

第一作者： Song, Guojie

作者： Song, Guojie;Bai, Yalin;Liu, Dan;Zhang, Yinchao;Li, Yuhan;Song, Guojie;Fan, Zhihao;Madadi, Meysam;Pan, Zhenying;Qin, Yuanhang

作者机构： Chinese Acad Agr Sci, Tobacco Res Inst, Key Lab Tobacco Gene Resources, Qingdao 266101, Peoples R China;Jiangnan Univ, Sch Biotechnol, Key Lab Ind Biotechnol, Minist Educ, Wuxi 214122, Peoples R China;Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China;Wuhan Inst Technol, Sch Chem Engn & Pharm, Key Lab Green Chem Proc, Hubei Key Lab Novel React & Green Chem Technol,Min, Wuhan 430205, Peoples R China

关键词： Lignocellulosic biomass; Surfactants; Organosolv pretreatment; In -situ lignin modification; Enzymatic hydrolysis

期刊名称：RENEWABLE ENERGY （ 2022影响因子：8.7； 五年影响因子：8.4 ）

ISSN： 0960-1481

年卷期： 2024 年 227 卷

页码：

收录情况： SCI

摘要： In this study, an efficient coupling surfactant to ethylene glycol pretreatment (EG) and enzymatic hydrolysis of sugarcane bagasse (SCB) was proposed to enhance fermentable sugar production with lower pretreatment energy consumption and reduced enzyme loading. Under optimized conditions, 5 % Tween 80 -assisted EG pretreatment of SCB achieved 80.5 % delignification while retaining cellulose (91.6 %) and hemicellulose (81.6 %) content. This led to an enhanced glucose yield of 81.3 %, compared to 65.1 % without Tween 80. The addition of Tween 80 to pretreatment modified residual lignin through etherification, reduced phenolic hydroxyl groups and enhanced hydrophilicity by 23.7 % and 9.4 %, respectively, compared to the lignin sample without Tween 80. Consequently, this modification alleviated non-productive adsorption between lignin and enzymes, improving substrate hydrolyzability. Moreover, when 4.5 % Triton -X 100 was introduced during the hydrolysis of Tween 80 -assisted EG-pretreated substrates, a maximum glucose yield of 91.8 % and xylose yield of 92.6 % were achieved. Energy and enzyme cost analyses revealed a reduction of 35 % in pretreatment energy consumption and a 58.8 % decrease in enzyme costs, thanks to the synergistic action of surfactants in EG pretreatment and enzymatic hydrolysis. Overall, integrating surfactants into pretreatment and enzymatic hydrolysis holds promise for highly efficient conversion of SCB into fermentable sugars in enzyme -mediated lignocellulosic biorefineries.

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