earticle

영어

Because of its economical benefits, bioethanol production from cellulose resources need to be developed by efficient pretreatment processes. The complex pretreatment process composed of ultrasonification and microwave processes was used to hydrolyze corn stover by using only water, not acids or alkalis for environmental issue. Ultrasonification process at 20kHz was performed at 120W, 250W or 340W input power for 60min and 70℃, and microwave pretreatment at 2450MHz were applied with 700W, 1300W or 1700W input power for 12min. The optimal condition for ultrasonification pretreatment was determined as 120W for 60min, having sugar yields as 5.6(% w/w) of glucose and 18.6(% w/w) of xylose, respectively. The optimal condition for microwave pretreatment was also estimated as 1700W for 4min, yield in 8.9(% w/w) of glucose and 32.1(% w/w) of xylose, respectively. Furthermore, complex process at 120W for 60min followed by 1700W for 4min had 10.7(% w/w) of glucose and 39.3(% w/w) of xylose conversion yield, respectively. After treatments, the residue were easily hydrolyzed by low dose of cellulose as 5FPU/ml. About 64.6% of cellulose was converted into glucose after complex pretreatment process. These results indicate that the complex pretreatment could increase glucose conversion yields up to 15% only by using water.