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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13277
Title: Improvement in pulp dewatering through cellulases
Authors: Piyush V.
Bhardwaj N.K.
Singh S.P.
Published in: IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association
Abstract: Enzymatic processes provide a natural solution for various problems encountered in the papermaking process. Studies have shown that a judicious choice of the enzyme component, its dosage, point of addition and the duration of treatment can help to achieve significant freeness increase, while avoiding degradation to the fibres. Cellulases have been studied for improved paper recycling since the 1980s. Secondary pulp contains great amount of fines having high relative surface area, therefore these fibers adsorb water to large extent. This effect of fines is enhanced by microfibrils and colloidal layer located on the surface. Thus dewatering rate on wire section is lower compared to virgin pulp. The result is considerably decreased productivity of the paper making process compared to operation using virgin pulp. Productivity of paper processing can be significantly increased through improvement of pulp drainage. This paper covers the understanding whether the effectiveness or strength loss depends on a specific type (EG or CBH) of enzyme activity. Interestingly, In the experiments carried out, the increased solubilization of amorphous cellulose mediated by endoglucanase treatments consequently improved drainability.
Citation: IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association (2013), 25(3): 105-108
URI: http://repository.iitr.ac.in/handle/123456789/13277
Issue Date: 2013
Keywords: Dewaterability
Drainage
Endo/exo cellulase
Enzymes
Pulp properties
Recycled pulp
ISSN: 3795462
Author Scopus IDs: 55116512600
55954738000
7407864677
Author Affiliations: Piyush, V., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur -247001 (U.P.), India
Bhardwaj, N.K., Thapar Centre for Industrial Research and Development, Paper Mill Campus, Yamuna Nagar -135001 (Haryana), India
Singh, S.P., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur -247001 (U.P.), India
Corresponding Author: Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur -247001 (U.P.), India
Appears in Collections:Journal Publications [PT]

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