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New polyoxometalate–laccase integrated system for kraft pulp delignification

Paper ID Volume ID Publish Year Pages File Format Full-Text
4951 261 2007 7 PDF Available
Title
New polyoxometalate–laccase integrated system for kraft pulp delignification
Abstract

New polyoxometalate–laccase integrated system (PLIDS) employing polyoxometalate [SiW11VVO40]5− and laccase of Trametes versicolor for the continuous delignification of eucalypt kraft pulp has been developed. Pulp was delignified in a batch reactor containing catalytic amounts of [SiW11VVO40]5− at about 90 °C under atmospheric pressure. Re-oxidation of reduced polyoxometalate (POM) with laccase was carried out at 45 °C in a separate aerated bioreactor coupled with an ultrafiltration tubular ceramic membrane. This allowed the separation of laccase from re-oxidized POM, which was supplied in turn continuously to the delignification reactor.Proposed PLIDS allowed sustainable pulp delignification with minimal degradation of polysaccharides. The implementation of PLIDS, instead the fist chlorine dioxide stage (D) in conventional DEDED bleaching sequence, showed almost 60% of chlorine dioxide savings with strength properties of the bleached pulp (90% ISO) similar to those obtained after the conventional bleaching.

Keywords
Enzyme biocatalysis; Integrated processing; Lignin; Polyoxometalate; Laccase; Ultrafiltration
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New polyoxometalate–laccase integrated system for kraft pulp delignification
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 33, Issue 2, February 2007, Pages 141–147
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