effect of cellulase on drainage and strength properties of virgin and recycled pulps

Document Type : Research Paper

Authors

1 Associate Professor, Department of Wood and Paper, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Iran

2 sari agricultural and natural resources university

Abstract

Enzymatic treatments have different effects on different types of pulps. In this study, the effect of cellulase treatment on drainage and dewatering capability and also paper strength properties of four types of first-hand (virgin) and recycled pulp was investigated. First-hand pulp included chemi-mechanical pulp (CMP) made from hardwoods (mixture of beech, hornbeam and poplar) of Iran northern forest and imported softwood bleached Kraft pulp (BKP) while recycled pulp comprised of old corrugated containerboard (OCC) pulp and deinked pulp (DIP). Both types of recycled pulps have been sourced from domestic factories in Iran. For enzyme treatment of pulp, the consistency of the pulp was set at 10%, the cellulase enzyme intake was 0.5% based on the dry weight of the pulp, the temperature, time and pH of the reaction were set at 50 Celsius centigrade, 60 min, and 5.5 to 6.5, respectively. From all kind of the pulp, before enzymatic treatment, fiber classification was performed in Bauer McNett fiber classifier and dimensional distribution of fibers and fine content in different types of pulp was determined. The results of this study showed that the effect of cellulase enzyme on chemical pulps with less lignin is more than semi-chemical pulp with more lignin and low cellulose. Cellulase enzymatic treatment increases the strength properties of pulp with more cellulose and improves the drain ability of the pulps with more fine content such as CMP and OCC.

Keywords

References

[1] Bajpai, P., (2010). Solving the problems of recycled fiber processing with enzymes. Bioresources, 5(2): 1-15.
[2] Dienes, D., Egyhazi, A., and Reczey, K., (2004). Treatment of recycled fiber with trichoderma cellulases. Industrial crops and products, 20:11-21.
 [3] Kent Kirk, T., Jeffries, T.W., (1996). Roles for microbial enzymes in pulp and paper processing. Institute for Microbial and Biochemical Technology, Forest Products Laboratory, Forest Service, U.S. Department of Agriculture, 1-14.
[4] Shamim A., Jain R., Mediratta R., Prasad k.p., and Arora, S.S., (2006). Enzymatic Treatment on chemical Pulp in Beating/Refining process-an Attempt toward Energy conservation. Journal of Ippta. 18(3). 127-132.
[5] Leatham, G., Myers. G., and Wegner, T., (1990). Biochemical pulping of aspen chips: energy savings resulting from different fungal treatments. Tappi J, 73:197–200.
 [6] Singh, R. and Bhardvaj., (2011). Enzymatic treatment of recycled fibers for improving of drainage: An overview. IPPTAJ, 23(2):121-126.
 [7] Mirshokraei, S.A., 2001. Guid to Waste Paper. Aeizh Press, Tehran, Iran, 140p. (Translaed In Persian)
 [8] Gil, N., Gil, C., Amara, M., Costa, A., and Duarte, A., (2009). Use of enzymes to improve the refining of bleached Eucalyptus globulus Kraft paper. Biochemical engineering journal, 2:89-95.
 [9] Sheikh H., and luo J., (2009). Identify cation, validation and Aplication of a cellulases specifically to Improve the Runnability of Recycled Furnishes. PrOCC.9th International Conference on pulp, paper and Allied Industry (Paperax), 277-283.
 [10] Tripathi, S., Nirmal, Sh., Mishra, O., Bajpai, p.and Bajpai, K., (2008). Enzymatic refining of chemicalpilp. Journalof IPPTA 20(3):129-132.
 [11] Park K., Park J., Song H., Shin H., Park J., and Ahn J.S., (2002). Biological reprocessing of mixed office waste paper (MOW) using modified cellulose by production of functional copolymer. Korean Journal. Eng,19:2.285-289.
[12] Bajpai P., Mishra Sh.P. Mishra O.P., Kumar S., and Bajpai P.K., (2006). Use of Enzymes for Reduction in Refining Energy-Laboratory Studies. Journal of Tappi. 5(11):25-32
[13] Yang G, Lucia LA, Cehn J, Cao X, Liu Y., (2011). Effects of enzyme pretreatment on thebeatability of fast-growing poplar AMP pulp. Bioresources 6(3):2568-2580.
[14] Pala H ،.Lemos, M., mota ,M,and Gama, F,M., (2001).EnzymaticUpgrade  of  containers . Journal of Enzyme and Microbial Technology, 29:274:279.
[15] Scott, W., (2002). Properties of paper an introduction, Aiij Press, 392 pages. (Translated in Persian)
 
Iranian Journal of Wood and Paper Industries
Volume 12, Issue 2
September 2021
Pages 207-215

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