Title of article :
Effect of pretreatment severity on xylan solubility and enzymatic breakdown of the remaining cellulose from wheat straw
Author/Authors :
Mirjam A. Kabel، نويسنده , , Gijs Bos، نويسنده , , Jan Zeevalking، نويسنده , , Alphons G.J. Voragen، نويسنده , , Henk A. Schols، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Abstract :
The effect of process conditions used for wheat straw pretreatments on the liquor- and residue-composition was studied. Hereto, the pretreatment conditions were expressed in a ‘combined severity -factor’. The higher the combined severity factor ( ) the more xylan was released from the wheat straw, but the more xylan decomposed and furfural formation occurred. The percentage of residual xylan present after pretreatment appeared to be a good indicator concerning cellulose degradability or bio-ethanol production. Namely, cellulose degradation by using commercial enzymes was higher at higher severities corresponding to a lower amount of residual xylan. The xylan release and degradation was studied in more detail by using HPSEC and MALDI-TOF mass spectrometry. The more severe the treatment the more (acetylated) xylose oligomers with a DP lower than nine were analysed. The presence of (acetylated) xylans with a DP of 9–25 increased slightly from low to medium severity. The quantification of the DP-distribution of the (acetylated) xylans released proved to be a good tool to predict cellulose degradability.
Keywords :
Bioethanol , WHEAT STRAW , Heat treatment , cellulases , Severity
Journal title :
Bioresource Technology
Journal title :
Bioresource Technology