OPTIMIZATION OF HYDROLYSIS CONDITIONS USING CENTRAL COMPOSITE DESIGN TO CONVERT CORN STOVER TO BIOETHANOL

The goal of the research was to find out optimum hydrolysis parameters to convert corn stover to bioethanol using response surface methodology. The pretreatment of corn stover was administered using alkali potassium hydroxide. The results of the pretreated indicated that the important elements of corn stover were cellulose, hemicellulose, and lignin, 35.23, 23.5, and 16.3% respectively. Additionally, cellulose is the main component of cornstover that is sufficient for biofuel production. Experimental layout and statistical evaluation were carried out using the response surface technique. Acid concentration at (1.5-2.5%, w/w), particle dimension (0.15-0.25 mm), temperature (125-145 °C) and time (30-80 min) were used to evaluate the hydrolysis parameters. The result indicates that the optimum hydrolyzed parameters were, acid concentration; 2.334 (w/w %), particle size; 0.153 mm, temperature; 144.976 0C, and time; 77.233 minutes. The optimized independent variables were derived from the quadratic model and selected primarily based on the highest desirability. Under these conditions, the yield of glucose and xylose was 48.69 and 33.091% respectively. After 48 h of fermentation time, 27.1 g of ethyl alcohol concentration was investigated (this is equivalent to 92.07% of theoretical yield of ethyl alcohol at optimized conditions).