Ethanol Production from Sugarcane Bagasse by Zymomonas mobilis Using Simultaneous Saccharification and Fermentation (SSF) Process

摘要

Considerable efforts have been made to utilize agricultural and forest residues asbiomass feedstock for the production of second-generation bioethanol as an alternative fuel.Fermentation utilizing strains of Zymomonas mobilis and the use of simultaneoussaccharification and fermentation (SSF) process has been proposed. Statistical experimentaldesign was used to optimize the conditions of SSF, evaluating solid content, enzymatic load,and cell concentration. The optimum conditions were found to be solid content (30%),enzymatic load (25 filter paper units/g), and cell concentration (4 g/L), resulting in amaximum ethanol concentration of 60 g/L and a volumetric productivity of 1.5 g L?1h?1.