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espace at MMU > Faculties > Faculty of Science and Engineering > Department of Biological Sciences Research: Fermentation and Industrial Microbiology (Biotechnology) > Optimization of biobleaching of paper pulp in an expanded bed bioreactor with immobilized alkali stable xylanase by using response surface methodology

Please use this identifier to cite or link to this item: http://hdl.handle.net/2173/31934
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Title: Optimization of biobleaching of paper pulp in an expanded bed bioreactor with immobilized alkali stable xylanase by using response surface methodology
Authors: Senthilkumar, Sundar R.
Dempsey, Michael J.
Krishnan, Chandraraj
Gunasekaran, Paramasamy
Citation: Bioresource technology, 2008, vol. 99, no. 16, pp. 7781-7787
Publisher: Elsevier
Issue Date: Nov-2008
URI: http://hdl.handle.net/2173/31934
DOI: 10.1016/j.biortech.2008.01.058
Additional Links: http://www.elsevier.com/locate/biortech
Abstract: Purified alkali stable xylanase from Aspergillus fischeri was immobilized on polystyrene beads using diazotization method. An expanded bed bioreactor was developed with these immobilized beads to biobleach the paper pulp in continuous mode. Response surface methodology was applied to optimize the biobleaching conditions. Temperature (°C), flow rate of pulp (ml/min) and concentration of the pulp (%) were selected as variables in this study. Optimal conditions for biobleaching process were reaction temperature 60 °C, flow rate of 2 ml/min and 5% (w/v) of pulp. The kappa number reduced from 66 in the unbleached pulp to 20 (reduction of 87%). This system proves to be a better option for the conventional chlorine based pulp bleaching.
Type: Article
Language: en
Description: Full-text of this article is not available in this e-prints service. This article was originally published following peer-review in Bioresource technology, published by and copyright Elsevier.
Keywords: Aspergillus fischeri
Biobleaching
Expanded bioreactor
Immobilization
Xylanase
ISSN: 0960-8524
EISSN: 1873-2976
Appears in Collections: Department of Biological Sciences Research: Fermentation and Industrial Microbiology (Biotechnology)

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