【摘要】 [目的]开发利用甘薯淀粉加工过程中的废弃物甘薯渣。[方法]对甘薯渣发酵制乙醇的工艺进行了研究,即在温和条件下超声波、超声波结合稀酸和超声波结合稀碱的预处理方法处理木质素后,再在热带假丝酵母和乙醇酵母的共同用下同时将其发酵生产乙醇。[结果]超声波结合稀碱预处理甘薯渣发酵制得乙醇的方法最好,且获得了最佳的工艺条件为固液比1∶15 g/ml、超声波预处理功率250W、时间为30 min,稀碱预处理质量分数为1.0%的NaOH溶液,纤维素酶用量35 IU/g底物,热带假丝酵母与酿酒酵母的接种比1∶1,酵母菌接种量0.75%,在该条件下乙醇产率达到21.4%(重量)以上,与传统工艺相比,产率提高14%。[结论]该研究提高了甘薯深加工产品的附加值,延长产业链,同时可以缓解环境污染问题,有工业推广价值。更多还原

【Abstract】 [Objective] To develop sweet potato residue during starch processing course.[Method] After pretreatment by ultrasonic,combination of ultrasonic with dilute acid and acid,Candida tropicalis and ethanol yeast to produce ethanol.[Result] The optimum processing conditions were: solid-liquid ratio 1∶15 g/ml,pretreatment power 250 W,time 30 min,1.0% NaOH solution,cellulase dosage 35 IU/g,inoculation amount 0.75%,under the above conditions,ethanol yield reached 21.4%,increased 14% than traditional technique.[Conclusion] The study will improve adding value for sweet potato deep-processing products,and extend industry chain with industrial extensive value.更多还原