초록
<P><B>Abstract</B></P> <P>Gooseweed (<I>Sphenoclea zeylanica</I> Gaertn.) is a pest on the rice field that has a potential to be a promising substrate for bioethanol production. Dry powdered gooseweed was firstly pretreated with 1% NaOH, following 1% H<SUB>2</SUB>O<SUB>2</SUB> at variety conditions. The hydrolysis process was set at 50°C for 24–72h with enzyme cellulase (β-glucosidase) while the fermentation process was carried using <I>Saccharomyces cerevisiae</I> TISTR 5020 at 33°C for nine days. The ethanol concentration was recorded for three, five, seven, and nine days using an ebulliometer. The results showed that the treatment with only 1% NaOH for 24h has the highest sugar performance. In regard with hydrolysis, the optimum retention time was at 24h. Lastly, the highest ethanol concentration was achieved at 11.84g/L after five days and a rapid decreasing after seven to nine days was also observed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Characterization of Gooseweed for bioethanol production were studied. </LI> <LI> A renewable co treatments alkaline – oxidant was applied on this new material. </LI> <LI> Improve sugar yield by optimization of pretreatment and hydrolysis processes. </LI> <LI> The maximum ethanol concentration achieved within 5days was 11.84g/L. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>