木薯干原料同步糖化发酵生产乙醇

提出了用木薯干为原料，同步糖化发酵(SSF)开发燃料乙醇的新工艺. 对各个影响条件进行了研究，获得了最佳的工艺条件：原料粉碎粒度0.45 mm，加水比2.8, 100℃下蒸煮30 min，a-淀粉酶、糖化酶的添加量分别为10, 180 U/g, 30℃下发酵48 h. 并与普通的先糖化后发酵(SHF)生产模式进行了对比，认为SSF具有工艺简单、能耗低、发酵迅速、醪液酒精度高等众多优点，值得工业推广.

Production of Ethanol by Simultaneous Saccharifiction and Fermentation from Cassava

The production of ethanol by simultaneous saccharification and fermentation (SSF), using cassava as raw material is presented. Through experiments under different conditions, the optimal technological conditions were obtained: cassava particle size below 0.45 mm, radio of cassava to water at 1:2.8, a-amylase and glucoamylase being 10 and 180 U/g respectively, and fermentation at 30℃ for 48 h. In comparison with the traditional production by separate hydrolysis and fermentation (SHF), it was found that SSF had many advantages, such as simple technology, low energy consumption, rapid fermentation and high concentration of ethanol, which is worthwhile to be explored and implemented in industry.