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Effect of Eucalyptus Kraft Pulp Enzyme Bleaching on Effluent Quality and Bio-Treatability


August 1, 2010
By Pulp & Paper Canada

Abstract: The filtrate and pulp quality of different enzymatic pre-bleaching conditions were characterized. Bio-treatability of the effluents was evaluated. Enzymatic pre-bleaching of Eucalyptus pulp …

Abstract: The filtrate and pulp quality of different enzymatic pre-bleaching conditions were characterized. Bio-treatability of the effluents was evaluated. Enzymatic pre-bleaching of Eucalyptus pulp was carried out in 4 different conditions of pH and enzyme dosage. The best pulp quality was achieved at pH 7, when smaller kappa number, higher pulp brightness and smaller amount of hexenuronic acid were observed. However, in this condition a higher yield loss and effluent COD load were observed. For all bio-treatment assays, the COD removal was higher than 85%.

Keywords: ENZYME BLEACHING, EFFLUENT, BIO-TREATMENT

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Full manuscript available at www.paptac.ca.


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