초록
<P><B>Abstract</B></P> <P>Bamboo shoots, 2- and 5-year-old bamboo were treated by using a homogenizer in a constant suspended state, a process termed as ultra-high pressure explosion (UHPE). The bamboo powder was heated in 2% NaOH solution at 121°C, and then 100MPa UHPE-treated through a homogenizer. The results verified that UHPE changed the suspension solution of powder into a stick fluid. The contents of lignin were decreased significantly. The bamboo shoots and 2-year-old bamboo were completely hydrolyzed to glucose within 48h by enzymes loading of 15 FPU of cellulase and 30IU of β-glucosidase per gram glucan. Fermentation of enzymatic hydrolyzates with <I>Saccharomyces cerevisiae</I> resulted in about 89.7–95.1% of the theoretical ethanol yield after 24h. Therefore, NaOH+UHPE is argued to be a potential alternative technology for pretreatment of bamboo.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Bamboo shoots, 2- and 5-year-old bamboo were compared in NaOH+UHPE pretreatments. </LI> <LI> Bamboo shoots, 2- and 5-year-old bamboo had different composition. </LI> <LI> Bamboo shoots, 2-year-old bamboo were better feedstocks than 5-year-old bamboo. </LI> <LI> NaOH+UHPE pretreatment significantly enhanced enzymatic digestibility of bamboo. </LI> <LI> NaOH+UHPE pretreatment reduced the degree of polymerization of bamboo cellulose. </LI> </UL> </P>