초록
<P><B>Abstract</B></P> <P>This study optimized bioethanol production from potato peel wastes on inputs of temperature, pH and solid loading using simultaneous saccharification and fermentation. Subsequently, the kinetics of yeast growth and bioethanol formation under the optimized conditions were assessed using the logistic and modified Gompertz models, respectively. Maximum bioethanol concentration (22.54 g/L) and yield (0.32 g/g) were observed under optimal process conditions of 40 °C (temperature), 5.78 (pH) and 12.25% w/v (solid loading). The logistic model gave a maximum specific growth rate and maximum cell biomass concentration of 0.20 h<SUP>−1</SUP> and 2.43 g/L respectively. Furthermore, the modified Gompertz model displayed a maximum bioethanol production rate, maximum potential bioethanol concentration and a lag time of 1.51 g/L/h, 15.47 g/L and 4.66 h respectively. Optimization and kinetic findings obtained from this study provide significant knowledge for the development of simultaneous saccharification and bioethanol production processes using starch-based agricultural wastes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Optimization of bioethanol production displayed high R<SUP>2</SUP> values (>0.90). </LI> <LI> High bioethanol concentration (22.54 g/L) and yield (0.32 g/g) was achieved. </LI> <LI> Kinetic parameters obtained using potato peels are comparable to glucose substrates. </LI> <LI> Knowledge for bioethanol production using starch-based wastes is elucidated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>