Abstract：
:This study aims to improve enzymatic sugar production from dilute sulfuric acid-pretreated barley straw for acetone-butanol-ethanol (ABE) fermentation. The effects of additive xylanase and surfactants (polyethylene glycol [PEG] and Tween) in an enzymatic reaction system on straw hydrolysis yields were investigated. By combined application of 2g/100g dry-matter (DM) xylanase and PEG 4000, the glucose yield was increased from 53.2% to 86.9% and the xylose yield was increased from 36.2% to 70.2%, which were considerably higher than results obtained with xylanase or surfactant alone. The ABE fermentation of enzymatic hydrolysate produced 10.8 g/L ABE, in which 7.9 g/L was butanol. The enhanced sugar production increased the ABE yield from 93.8 to 135.0 g/kg pretreated straw. The combined application of xylanase and surfactants has a large potential to improve sugar production from barley straw pretreated with a mild acid and that the hydrolysate showed good fermentability in ABE production.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Yang M,Zhang J,Kuittinen S,Vepsäläinen J,Soininen P,Keinänen M,Pappinen Adoi
10.1016/j.biortech.2015.04.008subject
Has Abstractpub_date
2015-01-01 00:00:00pages
131-137eissn
0960-8524issn
1873-2976pii
S0960-8524(15)00491-5journal_volume
189pub_type
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