Use of viscozyme enzyme as an alternative technology for pulp refining and improvement bagasse soda pulp properties

Document Type : Research Paper

Abstract

In this research, the effect of enzyme treatment to modify bagasse soda pulp properties was investigated. Viscozyme enzyme (mixture of carbohydrates degrading enzymes) extracted from fungus Aspergillus aculeatus was added to pulp at different dosages of 0.5, 1 and 2 IU (based on per gram of oven dry pulp) and reaction times of 0.5, 1 and 2 hours. Tappi standard was used for preparation handsheets. For comparison handsheets from analysis of variance test and for comparison of the means from Duncan test were used. The results showed that pulp freeness and polymerization degree of pulp decreased as enzyme dosages and reaction times increased. In fact, enzymatic pretreatment by partial fiber fibrillation played the role of a refiner and improved mechanical properties of paper. Enzymatic treatment improved tensile and burst index. Enzyme concentration of 0.5 IU and 1hr reaction time had the most effect on tensile and burst index. Although higher enzyme concentrations (2IU) decreased strength properties of paper due to declined viscosity, but in comparison with control sample had more strengths.

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