NDLI: The effect of chemical and physical characteristics of spruce SEW pulps on enzymatic hydrolysis

Content Provider	Springer Nature Link
Author	Yamamoto, Minna Iakovlev, Mikhail Heiningen, Adriaan
Copyright Year	2014
Abstract	Conifers, which are the most abundant biomass species in Nordic countries, USA, Canada and Russia, exhibit strong resistance towards depolymerization by cellulolytic enzymes. At present, it is still not possible to isolate a single structural feature which would govern the rate and degree of enzymatic hydrolysis. On the other hand, the forest residues alone represent an important potential for biochemical production of biofuels. In this study, the effect of substrate properties on the enzymatic hydrolysis of softwood was studied. Stem wood spruce chips were fractionated by SO2–ethanol–water (SEW) treatment to produce pulps of varying composition by applying different operating conditions. The SEW technology efficiently fractionates different types of lignocellulosic biomass by rapidly dissolving hemicelluloses and lignin. Cellulose remains fully in the solid residue which is then treated by enzymes to release glucose. The differences in enzymatic digestibility of the spruce SEW pulp fibers were interpreted in terms of their chemical and physical characteristics. A strong correlation between the residual lignin content of SEW pulp and enzymatic digestibility was observed whereas cellulose degree of polymerization and hemicellulose content of pulp were not as important. For the pulps containing about 1.5 % (w/w) lignin, 90 % enzymatic digestibility was achieved at 10 FPU enzyme charge and 24 h of hydrolysis time.
Starting Page	3395
Ending Page	3407
Page Count	13
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	21
Issue Number	5
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-08-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biorefinery Enzymatic hydrolysis Lignin inhibition Pretreatment SEW fractionation Softwood Bioorganic Chemistry Physical Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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