Aguilar-Reynosa, Alejandra; Romaní , Aloia; Rodrí guez-Jasso, Rosa M.; Aguilar, Cristó bal N.; Garrote, Gil; Ruiz, Hé ctor A.
초록
<P><B>Abstract</B></P> <P>This work describes the application of two forms of heating for autohydrolysis pretreatment on isothermal regimen: conduction-convection heating and microwave heating processing using corn stover as raw material for bioethanol production. Pretreatments were performed using different operational conditions: residence time (10–50 min) and temperature (160–200°C) for both pretreatments. Subsequently, the susceptibility of pretreated solids was studied using low enzyme loads, and high substrate loads. The highest conversion was 95.1% for microwave pretreated solids. Also solids pretreated by microwave heating processing showed better ethanol conversion in simultaneous saccharification and fermentation process (92% corresponding to 33.8g/L). Therefore, microwave heating processing is a promising technology in the pretreatment of lignocellulosic materials.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hemicellulose removal by microwave heating was higher than conduction-convection. </LI> <LI> Autohydrolysis by microwave heating improves enzymatic hydrolysis of corn stover. </LI> <LI> High glucose yield is achieved using relative low enzyme dosage. </LI> <LI> SSF at high loading allows ethanol conversions up to 92%. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>