中文摘要：

在原位合成拟薄水铝石中加入酵母和海藻酸钠，搅拌并冷冻后制备固定化酵母，以甘蔗废糖蜜生产乙醇。通过复合材料固定化酵母增殖机理发现，固定化酵母数达4．1×10^9／mL，批式发酵中14h消耗了90．5％的总糖；40d连续流动中，稀释率为0．100h^-1时，最大载体乙醇产率为52．0g／（L·h）。SEM表征表明，该固定化酵母细胞密度高，孔道结构丰富，利于细胞的繁殖生长和物质传送。乙醇发酵过程彻底，速率快，残糖水平低，原料利用率和发酵醪乙醇质量浓度均超过传统工艺。

英文摘要：

A new kind of carrier for the immobilization yeast to produce ethanol from sugar cane molasses was made by in-situ synthetic pseudo-boehmite （α-AlOOH） mixed with yeast and Na alginate. The results show that the composite carrier has a biology capacity of 4.1 ×10^9 n/mL. 90.5% of total sugar was consumed after 14 h in the batch fermentation. The maximum carrier ethanol productivity of 52, 0 g/（ L · h） appeared at the dilution rate of 0. 100 h-1 in the 40 d continuous flow alcohol fermentation. The scanning electron microscopy （ SEM ） of the carriers reveals that the composite carrier is much more porous than α-AlOOH and Ca alginate, which facilitates the transmission of substrates and products between carriers and medium. The experiments show that the composite carrier of Al alginate-based α-AIOOH has higher carrier ethanol productivity, lower residual sugar concentration than the traditional technology, and can get higher conversion ratio of material and ethanol mass concentration.