中文摘要：

探讨了大米草浓酸水解的影响因素，采用正交试验优化得到了大米草最佳水解条件：硫酸质量分数为50％、水解时间为60min、水浴温度为50℃、大米草粒径为10-20目、固液质量比为1：9，此时糖的得率达36％。利用基因工程菌6508—127发酵大米草水解液生产燃料酒精，产率为8．9g/100g（乙醇／大米草）；利用圆红冬孢酵母As2．1389发酵大米草水解液生产生物油脂，产率为6．4g/100g（油脂／大米草）。

英文摘要：

The key factors affecting the hydrolysis of common cordgrass by concentrated sulfuric acid were optimized using Orthogonal Experimental Method.The optimized hydrolysis conditions are that the concentration of sulfuric acid is 50% ,the hydrolyzing temperature is 50 ℃,the hydrolyzing time is 60 min,the granularity of common cordgrass is 10-20 meshes and the solid content is 1：9 （w/w）.The yield of reducing tions are glucose and xylose in this sugar is 36% under this condition. The main sugar composicommon cordgrass hydrolysate. Using the recombinant yeast strain 6508-127, 8.9 g/100 g （ethanol/ common cordgrass） was produced by fermentation of the common cordgrass hydrolysate. Using the yeast strain Rhodosporidium. toruloides As 2.1389, 6.4 g/ 100 g （biolipid/common cordgrass） was produced by fermentation of the common cordgrass hydrolysate.