Xylanases kraft pulping

D. J. Senior,]. Hamilton, R. L. Bernier, and]. P. Manoir, "Reduction ia Chlorine Use During Bleaching of Kraft Pulps EoUowiag Xylanase... 

J Wang, Z-H Jiang, DS Argyropoulos. Isolation and characterization of lignin extracted from softwood kraft pulp after xylanase treatment. J Pulp Pap Sci 23 J47-J51, 1997. 

A Kantelinen, B Hording, J Sundquist, M Linko, L Viikari. Proposed mechanism of the enzymatic bleaching of kraft pulp with xylanases. Holzforschung 47 318-324, 1993. 

Microbial xylanases are enzymes with biotechnological potential in many industrial processes, such as pre-bleaching of kraft pulp, improvement of the digestibility of animal... 

Xylanases are enzymes of great potential for industrial applications. They are mainly used in the pretreatment of Kraft pulp, improving bleachability of pulp while decreasing consumption of chlorine chemicals [5, 6]. These enz3mies are also used as additives to pig and poultry cereal-based diets, to improve nutrient utilization [7], in flour improvement for bakery products [8], in saccharification of agricultural, industrial and municipal wastes [9], and in juice and wine clarification [1]. 

Damiano, V. B., Bocchini, D. A., Gomes, E., Da Silva, R. (2003). Application of crade xylanase from Bacillus licheniformis 77-2 to the bleaching of eucalyptus Kraft pulp. W. Journal of Microbiology and Biotechnology, 19, 139-144. 

Figure 4. Immunolabelling of bleached birch kraft pulp with anti-MeGlcAXyl prior to (a) and after removal of 25% of original xylan by extensive xylanase treatment (b) and after labelling with anti-xylan antibody (polymeric xylan as antigen) (c). FITC was used as the fluorescent conjugate.

Chemical (kraft) and mechanical pulp (TMP) fibres (unbleached and bleached) were obtained from Finnish pulp mills. Hemicellulose profiles on the surfaces of chemical and mechanical pulp fibres were modified by enzymatic treatments. Extensive treatments with xylanase or mannanase (5000 nkat/g) were... 

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