橡子淀粉乙醇化酵母菌种的筛选

[目的]筛选适于以橡子淀粉为发酵原料的高性能优良酵母菌种.[方法]从几种工业上较常用的酒精用酵母中,筛选适合于橡子淀粉质原料发酵的菌种,对它们的发酵性能、酒精产量、残糖含量等方面进行分析比较.[结果]分析得出,南阳6号酵母较其他菌株的酒精产率高、残还原糖低,发酵性能优良;而兰州L166发酵性能较高,同时耐受性好,南阳6号与兰州L166是所选取的菌株中较适合橡子淀粉发酵生产燃料乙醇的菌株.[结论]在实际生产过程中,应根据橡子原料中成分的不同对相应菌种加以选用.

Screening of Yeast Strains for Ethanol Production by Acorn Starch Fermentation

[ Objective ] To screen out high performance excellent yeast strains with acorn starch as termentation raw matertal. L lVlethoCl ] theappropriate strains were selected from several commonly used yeasts in industry, the fermentation performance, alcohol yield and the content ofresidual sugar were compared. [ Result] Compared with other strains, yeast of Nanyang No. 6 has higher alcohol yield, lower residual reducingsugar, and excellent fermentation performance ; Lanzhou L166 has higher fermentation performance and good tolerance, Nanyang No. 6 andLanzhou L166 are appropriate strains for producing ethanol by acorn starch fermentation. [ Conclusion] In practical production process, appro-priate strains should be selected according to composition of acorn raw material.