菊芋替代玉米发酵生产乙醇的初步研究

对以果糖基能源植物——菊芋作为唯一碳源,发酵生产乙醇的可行性进行了探讨。结果显示,酿酒酵母BY4742可以良好地利用菊芋水解产物生长和代谢,生物量和乙醇产量和葡萄糖或果糖做底物时相比无明显差异。当底物浓度较高时,菌种对糖化菊芋汁中还原糖的利用率明显下降,但是乙醇产量没有下降,说明菊芋中含有的一些可溶性蛋白、氨基酸和矿物质有可能被菌种代谢利用转化成乙醇。另外,还从经济角度简单分析了菊芋替代玉米发酵生产乙醇的优势和不足。

The Primary Study of Ethanol Production by Fermenting of Jerusalem Artichoke Instead of Corn

The feasibility of producing ethanol through the fermentation of Jerusalem artichoke(JA) was studied.The results show that Saccharomyces cerevisiae BY4742 can be a good use of the hydrolysis product of JA,the biomass and the yield of ethanol are no significant difference from when glucose or fructose being substrate.When the concentration of substrate higher,The ratio of reducing sugar utilization decreased,but the concentration of ethanol has not declined.JA contains a number of soluble proteins,amino acids and minerals.These might be transformed into ethanol through metabolism of the bacterium.In addition,the paper analyses the advantages and shortcomings of fermentation of JA instead of corn from the economic perspective.