초록
<P><B>Abstract</B></P> <P>In this study, the use of carnauba straw residue to produce cellulosic ethanol by simultaneous saccharification and fermentation (SSF) with three industrial yeasts was investigated. Hydrothermal (HT), alkaline (AL), and acid–alkaline (AA) pretreatments were carried out on the residues, and the efficiency of the enzymatic hydrolysis of these residues was evaluated. The SSF was performed using <I>Saccharomyces cerevisiae</I> UFLA CA11, <I>Saccharomyces cerevisiae</I> CAT-1, and <I>Kluyveromyces marxianus</I> ATCC-36907 at 35, 40, and 45 °C. The AL pretreatment resulted in the best removal of lignin and hemicellulose. In addition, enzymatic hydrolysis of the dry residue treated with AL converted 64.43% of the lignocellulosic biomass to sugars. SSF of the AL-pretreated residue using <I>Kluyveromyces marxianus</I> ATCC-36907 cultivated at 45 °C produced 7.53 g/L ethanol.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Use of agroextractive residue - Carnauba straw (CS) - for producing ethanol. </LI> <LI> Alkaline pretreatment reduces hemicellulose and lignin in Carnauba residue. </LI> <LI> Ethanol production by Simultaneous Saccharification and Fermentation (SSF). </LI> <LI> <I>Kluyveromyces marxianus</I> ATCC-36907 using SSF produces 7.53 g/L ethanol. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>