Screw extrude steam explosion: a promising pretreatment of corn stover to enhance enzymatic hydrolysis.
A screw extrude steam explosion (SESE) apparatus was designed and introduced to pretreat corn stover continuously for its following enzymatic hydrolysis. SESE parameters temperature (100, 120, 150°C) and residence time (1, 2, 3min) were investigated. The enzymatic hydrolysis of corn stover pretreated by SESE and steam explosion (SE) process was carried out and analyzed systematically. A serial of analysis methods were established, and the corn stover before/after the pretreatment were characterized by scanning electron microscope (SEM), X-ray Diffraction (XRD) and Thermal Gravity/Derivative Thermal Gravity Analysis (TG/DTG). After treated by SESE pretreatment at the optimum condition (150°C, 2min), the pretreated corn stover exhibited highest enzymatic hydrolysis yield (89%), and rare fermentation inhibitors formed. Characterization results indicated that the highest yield could be attributed to the effective removal of lignin/hemicellulose and destruction of cellulose structure by SESE pretreatment.
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 210009, China; College of Life Science and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, China.
Jingwen
J
Chen
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 210009, China; College of Life Science and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, China.
Wengui
W
Zhang
Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009, China.
Hongman
H
Zhang
Electrical and Mechanical Engineering College - Safety Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Qiuxiang
Q
Zhang
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 210009, China; College of Life Science and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, China. Electronic address: biotech@njut.edu.cn.
He
H
Huang
D056804:Biofuels; D006358:Hot Temperature; D006868:Hydrolysis; D003313:Zea mays / Q000737:chemistry*
D056804:Biofuels
Corn stover pretreatment; Enzymatic hydrolysis; Fermentation inhibitors; Screw extrude steam explosion