Abstract：
:The focus of this study was to find out the effect of bark on SO2-ethanol-water (SEW) fractionation and enzymatic hydrolysis of forest biomass. Softwood bark was found to be more harmful than hardwood bark in both processes. For softwood, the amount of undigested wood in SEW fractionation increased with the increasing bark content, whereas the hardwood bark did not impair the fractionation of wood. The higher the softwood bark content was the lower were the yields in enzymatic hydrolysis likely due to the unproductive binding of enzymes on lignin and other compounds. Addition of surfactant Tween 20 (2% w/w on substrate) prior to enzyme more than doubled the sugar yield of bark-rich softwood pulp. Hardwood bark impaired enzymatic hydrolysis when its share was over 28%. According to a preliminary study, lignosulfonates from the carry-over liquor seem to improve the sugar yield in the enzymatic hydrolysis by acting as a surfactant.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Yamamoto M,Niskanen T,Iakovlev M,Ojamo H,van Heiningen Adoi
10.1016/j.biortech.2014.06.019subject
Has Abstractpub_date
2014-09-01 00:00:00pages
390-7eissn
0960-8524issn
1873-2976pii
S0960-8524(14)00863-3journal_volume
167pub_type
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