Utilization of N , N -Dimethylethanolamine for Deconstruction of Lignocellulose by Removing Lignin to Enhance Enzymatic Hydrolysis Efficiency and Microbial Fermentability for Bioalcohol Production

Key Points

• This research aims to enhance enzymatic hydrolysis efficiency and microbial fermentability of lignocellulose using N,N-dimethylethanolamine.
• Utilized a cosolvent DMEA/H2O at a 40:60 ratio for pretreatment of corn stover.
• Conducted pretreatment at 130 °C and 0.5 MPa for 2 hours.
• Evaluated lignin removal efficiency, glucan recovery, and enzymatic yield of glucose.
• Used Clostridium-yeast two-stage fermentation for bioalcohol production.
• Achieved 91.18% lignin removal and 89.73% glucan recovery from corn stover.
• Enzymatic yield of glucose reached 95.96% at 2% solid load, 4.66-fold greater than untreated corn stover.
• Produced 11.93 g/L of bioalcohol with a content >95%.