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Prebleaching of softwood and hardwood pulps by a high performance xylanase belonging to a novel clade of glycosyl hydrolase family 11

Paper ID Volume ID Publish Year Pages File Format Full-Text
17879 42703 2008 9 PDF Available
Title
Prebleaching of softwood and hardwood pulps by a high performance xylanase belonging to a novel clade of glycosyl hydrolase family 11
Abstract

To discover and develop a xylanase enzyme that can significantly enhance wood pulp bleachability under typical kraft process conditions (high temperature and alkaline pH), close to 200 xylanases from diverse environments were discovered and screened using a 3-stage (XDEp) pulp biobleaching assay. Four xylanases belonging to a new clade of glycosyl hydrolase family 11 outperformed all other enzymes by reducing bleaching chemical consumption by 15–25% on softwood and hardwood pulps. During the screening process, many thermostable and alkali-tolerant family 10 xylanases were also identified, however, family 10 xylanases in general were not as effective as those from family 11 in enhancing wood pulp bleachability. The candidate selected for developing a prebleaching xylanase enzyme product, Xyn11a, retained 80% of its maximum activity after incubation at 65 °C for 30 min.

Keywords
Xylanase; Enzymatic treatment; Biobleaching; Prebleaching; Bleach chemical reduction; Enzymatic delignification
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Prebleaching of softwood and hardwood pulps by a high performance xylanase belonging to a novel clade of glycosyl hydrolase family 11
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 42, Issue 5, 4 April 2008, Pages 395–403
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us