Optimization of a Laccase-Mediator Stage for TCF Bleaching of Flax Pulp
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چکیده
منابع مشابه
Optimization of Laccase-Aided Chlorine Dioxide Bleaching of Bagasse Pulp
The laccase-mediator system in laccase-aided chlorine dioxide bleaching of bagasse pulp was optimized using response surface methodology (RSM). The effects and interactions of the laccase enzyme dosage, the dosage of the mediator 1-hydroxybenzotriazole (HBT), and the reaction time on the adsorbed organic halogen (AOX) content of the wastewater as well as the brightness and kappa number of the p...
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Structural modification of eucalypt pulp lignin was investigated in a totally chlorine-free (TCF) bleaching sequence including a laccase-mediator stage. This stage was applied after two oxygen delignification stages, and was followed by an alkaline peroxide stage. After two oxygen delignification stages, two more stages with a laccase mediator and alkaline peroxide were applied. The residual li...
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8 Flax pulp was bleached by using an enzyme treatment with laccase (L stage) in the presence of HBT as 9 mediator in order to replace chlorine-based pulp bleaching processes which produce toxic organochlorine 10 compounds with biotechnological products, achieving an environmentally friendly process technology. 11 Enzyme treatments were sequentially conducted according to a factorial design invo...
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The influence of operating variables [viz: temperature 55-85°C, process time 30-120 min, pH 9-11,peraceticacid concentration 0.5-3.5% oven dried pulp (o.d.p.)., and sodium perborate concentration 1-5% o.d.p.] on the bleached pulp characteristics [viz: viscosity (VI), brightness (BR), kappa number (KN)], and resulting paper sheets properties [viz: breaking length (BL), stretch (ST), tear (TI), a...
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This study aimed at assessing the biobleachability of soda pulps obtained from olive tree pruning residue. The enzymatic (LMS) pretreatment was applied prior to a simple totally chlorine free (TCF) bleaching sequence, consisting of an alkaline extraction and a hydrogen peroxide stage. Additionally, the effect of adding xylanase jointly with or prior to LMS was evaluated. All of these enzymatic ...
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ژورنال
عنوان ژورنال: Holzforschung
سال: 2003
ISSN: 0018-3830
DOI: 10.1515/hf.2003.076