Title of article :
Enzymatic hydrolysis of hardwood and softwood harvest residue fibers released by sulfur dioxide–ethanol–water fractionation
Author/Authors :
Yamamoto، نويسنده , , Minna and Iakovlev، نويسنده , , Mikhail and Bankar، نويسنده , , Sandip and Tunc، نويسنده , , Mehmet Sefik and van Heiningen، نويسنده , , Adriaan، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
9
From page :
530
To page :
538
Abstract :
The enzymatic hydrolysis of hardwood and softwood harvest residues treated by SO2–ethanol–water (SEW) fractionation was studied. The target was to convert these fibers with high yield into glucose monomers which could be further converted into biofuel by a subsequent fermentation stage. Hardwood biomass residues were efficiently digested at low enzyme dosage (5 FPU/g cellulose) whereas the softwood residues required notably higher enzyme dosage (20 FPU) for sufficient conversion. However, cellulase dosage of softwood could be reduced mannanase supplementation. Especially the high lignin content of softwood biomass pulps impairs the digestibility and thereby, improved delignification could notably enhance the hydrolysis yields. It was shown that inferior delignification of SW biomass is due to persistent polyphenolic acids present in coniferous bark, whereas no evidence of the negative effect of inorganics and acetone extractives was observed. Additionally, SW hydrolyzate was successfully converted into a mixture of butanol, acetone and ethanol through ABE fermentation.
Keywords :
ABE fermentation , Harvest residue , Biorefinery , Enzymatic hydrolysis , SO2–ethanol–water (SEW) fractionation
Journal title :
Bioresource Technology
Serial Year :
2014
Journal title :
Bioresource Technology
Record number :
1937183
Link To Document :
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