Optimal Process of Bagasse Synergistic Hydrolysis with Ultrasonic and WO_3/ZrO_2 Solid Acid

[Objective] The aim was to study bagasse hydrolyzed with ultrasonic pretreatment and WO3/ZrO2 solid acid to prepare reducing sugar.[Method] The effects of hydrolysis temperature,quality of solid acid,hydrolysis time,and liquid-solid mass ratios on the reducing sugar yield in the hydrolyzate were discussed.A quadratic regression model was founded with response surface methodology,and the process was optimized.[Result] The result showed that the reducing sugar yield was 75.65%,the hydrolysis temperature was 97.52 ℃,quality of solid acid was 5.76%,hydrolysis time was 3.10 h,and liquid-solid mass ratios was 18∶1.The reducing sugar yield increased 21.91% compared with the sample which was not pretreated with ultrasonic microwave at the same condition.[Conclusion] Ultrasonic pretreatment process could promote the hydrolysis of bagasse.