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An improved TCF sequence for biobleaching kenaf pulp: influence of the hexenuronic acid content and the use of xylanase

Bioresource technology, 2014, Vol.152, p.253 [Tạp chí có phản biện]

Copyright © 2013 Elsevier Ltd. All rights reserved. ;info:eu-repo/semantics/openAccess ;ISSN: 0960-8524 ;EISSN: 1873-2976 ;DOI: 10.1016/j.biortech.2013.11.014 ;PMID: 24296121

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Nhan đề:
An improved TCF sequence for biobleaching kenaf pulp: influence of the hexenuronic acid content and the use of xylanase
Tác giả: Andreu, Glòria ; Vidal, Teresa
Chủ đề: Biological Oxygen Demand Analysis ; Biotechnology - methods ; Blanqueig ; Blanqueig de pastes ; Bleaching ; Bleaching Agents - pharmacology ; CHEMICAL PULPS ; Chlorine - chemistry ; ECF ; Endo-1,4-beta Xylanases - metabolism ; Enginyeria paperera ; Fustes papereres ; Hexenuronic acids ; Hexuronic Acids - analysis ; Hibiscus - chemistry ; Hibiscus - drug effects ; IMPACT ; Industrial applications ; Kenaf ; Kenak, fibra de ; Kraft pulping ; KRAFT PULPS ; Laccase ; Laccase-mediator system (LMS) ; Lignin - isolation & purification ; NATURAL MEDIATOR SYSTEMS ; Pasta de paper ; Pasta paperera ; Primeres matèries papereres ; TCF bleaching sequence ; Technological innovation ; Trametes - enzymology ; Viscosity ; Waste Disposal, Fluid ; Wood-pulp ; Xylanase ; Xylanases ; Àrees temàtiques de la UPC
Là 1 phần của: Bioresource technology, 2014, Vol.152, p.253
Mô tả: Enzymatic delignification with laccase from Trametes villosa used in combination with chemical mediators (acetosyringone, acetovanillone and 1-hydroxybenzotriazole) to improve the totally chlorine-free (TCF) bleaching of kenaf pulp was studied. The best final pulp properties were obtained by using an LHBTQPo sequence developed by incorporating a laccase-mediator stage into an industrial bleaching sequence involving chelation and peroxide stages. The new sequence resulted in increased kenaf pulp delignification (90.4%) and brightness (77.2%ISO) relative to a conventional TCF chemical sequence (74.5% delignification and 74.5% brightness). Also, the sequence provided bleached kenaf fibers with high cellulose content (pulp viscosity of 890 g·mL(-1) vs 660 g·mL(-1)). Scanning electron micrographs revealed that xylanase altered fiber surfaces and facilitated reagent access as a result. However, the LHBTX (xylanase) stage removed 21% of hexenuronic acids in kenaf pulp. These recalcitrant compounds spent additional bleaching reagents and affected pulp properties after peroxide stage.
Nơi xuất bản: England
Ngôn ngữ: English
Số nhận dạng: ISSN: 0960-8524
EISSN: 1873-2976
DOI: 10.1016/j.biortech.2013.11.014
PMID: 24296121
Nguồn: Recercat

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An improved TCF sequence for biobleaching kenaf pulp: influence of the hexenuronic acid content and the use of xylanase

Copyright © 2013 Elsevier Ltd. All rights reserved. ;info:eu-repo/semantics/openAccess ;ISSN: 0960-8524 ;EISSN: 1873-2976 ;DOI: 10.1016/j.biortech.2013.11.014 ;PMID: 24296121

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