Study of influencing factors on solid state fermentation from sweet sorghum straw

In this study, sweet sorghum straw was used as material for solid-state fermentation to produce ethanol. In order to confirm the suitable conditions of solid-state fermentation, through single-factor test and orthogonal test, the effect of different sweet sorghum varieties, different fermentation strains, and different fermentation including pH, inoculation amount temperature, time were studied.The results showed that the Silimei was suitable fermentation variety, Dan Baoli was suitable fermentation yeast strains. Through the orthogonal experiment, the optimization fermentation was decided as following: pH6.0, inoculation amount was 5%, fermentation temperature was 33 ℃, fermentation time was 3 d. And alchol degree of final production was 4.1%(v/v). The optimumization conditions, if harvest yield of sweet sorghum straw was 5000 kg/mu, the output of ethanol would be 328.0 kg.