초록
<P>In this paper, the sweet sorghum straw by alkali pretreatment has been fermented to alcohol with synchronized hydrolysis and fermentation technology. According to the quadratic orthogonal rotating of four factors combination experimental design, the test studied the relationship between the nutrient additive amount about (NH4)2SO4, KH2PO4, MgSO4·7H2O, CaCl2 and alcohol yield, meanwhile this fermentation 1conditions were optimized. By analysis, these factors impacted alcohol yield and the mathematical equations has been established about four factors on the yield of alcohol. The results showed that a significant regression equation was obtained. The optimum conditions for alcohol yield are obtained, (NH4)2SO4 0.09 percent, KH2PO4 0.1 percent, MgSO4·7H2O 0.414 percent, CaCl2 0.385 percent, at this time alcohol yield is 13.07 percent (by weight).</P>