木薯粉制备燃料酒精的生料低温水解工艺研究

Preparation of fuel alcohol by low-temperature hydrolysis of raw cassava meal

针对目前生淀粉发酵存在发酵周期长、淀粉利用率低等问题,以木薯粉为原料研究生料低温水解发酵工艺。实验先分析了酵母的耐糖能力,然后通过单因素实验和正交实验得到了低温水解发酵最佳工艺,并进行了验证。实验结果表明,生料低温水解发酵工艺相对于生料同步糖化发酵工艺有明显的优势,发酵周期缩短了48h,残总糖下降了52.6%,出酒率和淀粉利用率分别提高了19.0%和18.0%。

Recently raw starch fermentation existing long cycle, low starch utilization and some other issues, low-tempera- ture hydro!ysis fermentation process of raw cassava meal was studied, the glucose tolerant ability of yeast was analyzed as the first step. Then through single factor experiments and orthogonal experiment, the optimum condition of low-temperature hy- drolysis fermentation process was conducted and validated. The results showed that： low-temperature hydrolysis of raw materi- als had obvious advantages, compared to simultaneous saccharification and fermentation of raw materials, The fermentation cy- cle decreased by 48 h, residual total sugar decreased by 52. 6%, the alcohol yield and starch utilization rate increased by 19.0 ~and 18.0%resDectivelv.