Study of ultrasonic technique application to enhance the pretreatment efficiency of bioethanol production from sugarcane bagasse

Tóm tắt

Lignocellulosic biomass is a potential material source for ethanol production. Particularly, the sugarcane bagasse (SCB) coming from the sugar waste of the refinery is very rich in lignocellulose that can be biochemically transformed into ethanol. However, its recalcitrant structure necessitates a pretreatment step to break up the lignocellulosic matrix, thus improving the accessibility of hydrolytic enzymes to carbohydrates for sugar production. Based on the results of some recent studies, the chemical pretreatment process can be improved further by the application of ultrasound. In this study, ultrasound-assisted alkaline pretreatment of sugarcane bagasse for fermentable sugar production was carried out and the influence of NaOH concentration, sonication temperature and time on the delignification was ascertained by establishing and solving a composite design of experiments. The ultrasound-assisted alkaline pretreatment efficiency was also examined by Scanning Electronic Microscope (SEM), Fourier Transform InfraRed (FTIR) and X-ray Diffraction (XRD) methods.