초록
<P><B>Abstract</B></P> <P> <I>Juncus maritimus</I> contains (41.5 ± 0.3)% cellulose and (31.34 ± 0.2)% hemicellulose on dry solid (DS) basis and has the potential to serve as a low cost feedstock for ethanol production. Dilute acid or freezing/thawing pretreatments and enzymatic saccharification were evaluated for conversion of halophyte plant from <I>J. maritimus</I> cellulose and hemicelluloses to monomeric sugars. The maximum concentration of released glucose from <I>J. maritimus</I> (53.78 ± 3.24) g L<SUP>−1</SUP>) by Freezing/thawing pretreatment and enzymatic saccharification (55 °C, pH 5.0 and 48 h) using CellicCTec2 from Novozymes and (49.14 ± 5.24) g L<SUP>−1</SUP> obtained by dilute acid pretreatment. The maximum yield of ethanol from acid pretreated enzyme saccharified <I>J. maritimus</I> hydrolyzate by <I>Saccharomyces cerevisiae</I> strain was (84.28 ± 5.11)% of the theoretical yield with a productivity of (0.88 ± 0.16)g L<SUP>−1</SUP> h<SUP>−1</SUP>. It was (90.87 ± 1.94)% of the theoretical yield with a productivity of (1.04 ± 0.10) g L<SUP>−1</SUP>h<SUP>−1</SUP> for freezing/thawing pretreated plant and enzymatic hydrolysis by CellicCTec2.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Conversion of halophyte plant, <I>Juncus maritimus</I>, into bioethanol. </LI> <LI> Two different methods of pretreatment were tested. </LI> <LI> The maximum ethanol yield was 90.87% of the theoretical yield of yeast. </LI> </UL> </P>