Abstract:

Taking cassava as test piece,employ the uniform design and orthogonal design studying in the technological parameters optimizated for raw cassava ethanol production,and discussed the two design’s methods characteristics,The results uniform design has more advantages than orthogonal design under the conditions of multi-levels and multi-factors;The optimal technological parameters for the ethanol yield were obtained: Ratio of solid to liquid 1:1.8, initial pH value 3.5,fermentation temperature 32℃,yeast inoculation amount 3.5×107cell/mL,(NH4)2SO4 0.5g,rotational speed 140rpm,dosage of gluloamylase , a-amylase and cellulase were 200 u/g,12 u/g and 25 u/g,fermentation cycle 120h,under the optimal conditions,ethanol concentration could reach 15.7%（9.2% under orthogonal design）.