超声波辅助Lewis酸预处理甘薯渣发酵制乙醇的工艺研究  

Preparing Ethanol by Fermenting Sweet Potato Residue pretreated Ultrasonic Assisted Lewis Acid Pretreatment

作　　者：徐雨濛 李庆文[1] 盛燕[1] 曾舟华[1] 

机构地区：[1]黄冈师范学院/催化材料制备及应用湖北省重点实验室,湖北黄冈438000

出　　处：《湖北农业科学》2014年第23期5820-5822,5827,共4页Hubei Agricultural Sciences

基　　金：湖北省教育厅产学研合作资助项目(CXY2009B044)

摘　　要：对超声波辅助Lewis酸预处理甘薯渣发酵制乙醇的工艺进行了研究。结果表明,在超声波辅助条件下,Lewis酸Cu Cl2对甘薯渣中木质纤维素的水解有一定的催化效果。采用Lewis酸Cu Cl2预处理甘薯渣发酵制乙醇的最佳工艺条件为固液比等于1∶15(m∶m,下同)、超声波预处理功率为250 W、时间30 min,金属氯化物Lewis酸Cu Cl2溶液质量分数为1.0%,纤维素酶用量为35 IU/g底物,热带假丝酵母与酿酒酵母的接种比为1∶1,酵母菌接种量为0.75%。在该条件下乙醇产率达到21.4%,与常规工艺相比,产率提高13.8%。Process of preparing ethanol by fermenting sweet potato residue pretreated with ultrasonic assisted Lewis acid was studied. The results showed that under the conditions of ultrasonic-assisted, Lewis acid CuCl2 had catalytic effects on the hydrolysis of lignocellulose in sweet potato residue. The optimal conditions were mass ratio of solid to liquid 1：15 （m：m）, ultrasonic pretreatment power at 250 W for 30 min, mass fraction of metal Lewis acid CuCl2 solution 1.0%, cellulose dosage of 35 IU/g, the ratio of candida tropicalis and saecharomyces cerevisiae of 1：1, yeast inoculation dose of 0.75%. Under these conditions, ethanol yield was 21.4%. Compared with conventional process, the yield increased by 13.8%.

关 键 词：甘薯渣 超声波 LEWIS酸 发酵 乙醇 

分 类 号：S531[农业科学—作物学]