title: Mild alkaline presoaking and organosolv pretreatment of corn stover and their impacts on corn stover composition, structure, and digestibility.
abstract: An efficient strategy was developed in current work for biochemical conversion of carbohydrates of corn stover into monosaccharides. Corn stover was first presoaked in mild alkaline solution (1% Na2S) under 40°C for 4h, after which about 35.3% of the lignin was successfully removed while the specific surface area was notably enlarged. Then the presoaked solids were subjected to organosolv pretreatment that employed 20% methanol with an addition of 0.2% HCl as catalyst at 160°C for 20min, and the maximum total sugar yield of the pretreated corn stover achieved was 98.6%. The intact structure of corn stover was disrupted by this two-step process, which resulted in a porous but crystalline structure of the regenerated solids that were mainly composed of cellulose. The enlarged specific surface area and increased accessibility made the regenerated solids highly digestible by a moderate enzyme loading.
authors.affiliation: Department of Biochemical Engineering, College of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, Jiangsu, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Qing
authors.affiliation: Department of Biochemical Engineering, College of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, Jiangsu, China.
authors.forename: Linlin
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Department of Biochemical Engineering, College of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, Jiangsu, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Guo
authors.affiliation: Department of Biochemical Engineering, College of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, Jiangsu, China.
authors.forename: Xiaohang
authors.initials: X
authors.lastname: Gao
authors.affiliation: Department of Biochemical Engineering, College of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, Jiangsu, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Biochemical Engineering, College of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, Jiangsu, China.
authors.forename: Yucai
authors.initials: Y
authors.lastname: He
authors.affiliation: Department of Biochemical Engineering, College of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, Jiangsu, China. Electronic address: zyjs@cczu.edu.cn.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D002241:Carbohydrates / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D002241:Carbohydrates; D002482:Cellulose; D008031:Lignin
keywords: Alkaline presoaking; Corn stover; Digestibility; Organosolv pretreatment; Saccharification