earticle

영어

Ethanol production processes using crops have been well established; however, utilization of a cheaper substrate such as lignocellulose could make bioethanol more competitive with fossil fuel, without the ethical concerns associated with the use of potential food resources. This
study, in this sense, dealt with the diluted acid pretreatment of cassava stem as lignocellulosic biomass, following by enzymatic saccharification and fermentation to form ethanol by S. cerevisiae. Pretreatment conditions were optimized using response surface methodology (RSM)
allowing the study on influence of the different variables (temperature, time, acid concentration). As a result, the optimal conditions were established for the pretreatment process with temperature at 177°C, 10 min of reaction time and acid concentration of 0.14M. In case of
saccharification, enzymatic digestibility was fixed at approximately 70% with cellulase 20 FPU/g cellulose considering economic feasibility. Also, ethanol concentration and yield were attained at 7.55 g/L in 24 h and 89.6%, respectively. This study presented not only the overall process but also an efficient bioethanol production from lignocellulosic materials.