HY分子筛改性海藻酸钙复合载体的酵母固定化及在燃料乙醇制备中的应用

YEAST IMMOBILIZATION OF ALGINATE-BASED MODIFIED HY ZEOLITE FOR FERMENTATION OF FUEL ETHANOL

乙醇汽油是目前重点推广的新型可再生能源之一。燃料乙醇新生产方法的研究对乙醇汽油的推广具有重要意义。介绍了一种改性HY分子筛与海藻酸钙形成复合载体固定化酵母的方法。制备的复合载体材料生物负载量可达4．3×10^9ml^-1；经反复使用60d，仍具有良好的生物活性，并保持了较高的发酵水平；应用于批式糖蜜酒精发酵工艺中，可使发酵时间缩短至16h。

Alcohol gasoline is one of new regenerative energy resource which should be promoted with emphasis. Research on new kind of alcohol fermentation method has the vital significance for its further application. In this paper, HY zeolite is modified with silane coupling agent 3-aminopropyl-triethoxysilane （APTES）, and mixed with alginate embedded with yeast as a hybrid carrier. Such composite carrier has a biology capacity of 4.3 ×10^9ml^-1 , and can use repeatedly at least 60 d, maintaining the high fermentation velocity. The fermentation time for a batch process was reduced to only 16 h.