초록
<P><B>Abstract</B></P> <P>This work studied a concurrent UV photocatalysis and alkaline H<SUB>2</SUB>O<SUB>2</SUB> pretreatment (UHP) to enhance the subsequent enzymatic hydrolysis of sisal waste in comparison with alkaline H<SUB>2</SUB>O<SUB>2</SUB> pretreatment (AHP). An optimal condition was identified for UHP at H<SUB>2</SUB>O<SUB>2</SUB> charge 0.1 g/g dried sisal waste, pH 10.0, and UV radiation for 6 h. Under this condition, UHP led to a delignification rate of 76.6%, a conversion to reducing sugar at 71.2%, and a conversion to glucose at 91.6%, respectively. XRD, FT-IR and SEM analysis showed an increase in crystalline degree and significant changes in the structure of sisal during UHP. The current study implicates that UHP is more efficient than AHP in pretreating sisal waste, with reduced H<SUB>2</SUB>O<SUB>2</SUB> charge, shortened pretreatment time, and enhanced enzymatic digestibility.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Sisal waste is an ideal lignocellulosic biomass for bioethanol production. </LI> <LI> Concurrent UV/alkaline H<SUB>2</SUB>O<SUB>2</SUB> pretreatment (UHP) of sisal waste was carried out. </LI> <LI> UHP was efficient in lignin removal with low H<SUB>2</SUB>O<SUB>2</SUB> charge and short pretreatment time. </LI> <LI> UHP pretreatment significantly enhanced enzymatic hydrolysis of sisal waste. </LI> </UL> </P>