Enzymatic solutions for recycled fibres Enzymatic applications in the pulp and paper industry have grown significantly in recent years, offering: Sustainable solutions Increased productivity Reduced variability of operations Improved quality Reduced manufacturing cost For decades, the growth of enzymatic applications in the pulp and paper industry was restrained partially by the level of understanding of
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Enzymatic solution for recycled fibres
After reading this article you will..
- know that enzymes are proteins by chemical nature and originate from living organisms and they are designed for very specific tasks, for instance the selective degradation of hemi celluloses.
- understand that enzymatic fibre surface attack enables enhanced strength or reduced beating energy, improves separation of attached impurities in particular printing colours (enzymatic drinking).
- understand that selective and efficient performance requires tailor-made enzymes or enzyme blends for each specific process conditions.
- learn that enzymes are sensitive to elevated temperatures (can be passivated by heating) and require appropriate pH.
Content
Recycled fibre
- Legislation
- Sources and quality of paper for recycling
- Recyclability of paper and board products – Deinkability
- Recycling versus recyclability
- Technical aspects of recycling
- Relevance of recyclability
- Repulpability and deinkability
- Deinkability test methods
- EPRC deinkability assessment
- Deinkability of different printed products
- Removability of adhesive applications
- EPRC assessment on removability of adhesive applications in graphic paper products
- Unit operations and equipment in recycled fibre processing
- Design of processes
- Design principles for stock preparation processes
- Process design for graphical grades, news print
- Process design for tissue
- Process design for board and packaging grades
- Reject and Sludge handling for graphical and tissue applications
- Reject and Sludge handling for board and packaging applications
- Water management
- Additives
- Deinking
- Bleaching of deinked pulp
- Process water treatment
- Sticky control – detackification
- Enzymatic solution for recycled fibres
- Papermaking potential of recycled fibre
- Differences between virgin and recycled fibre
- Repeated (manifold) recycling experiments
- Multiple papermaking with recycled fibres
- Modelling of fibre age distribution
- Special request of recycled fibre furnish in papermaking
- Effects of recycled fibre in papermaking
- Challenges of increased recycled fibre utilisation
Authors & references
Authors:
Roland Pelzer, James G. Tausche, Dr Jianhu Ma; Manuel Fuzy, Joerg Polste
Based on: Papermaking Science and Technology, book 7, Recycled fibre and deinking, Höke U. and Schabel S. (Book editor). Chapter 7 Additives. Jyväskylä, 2000, Fapet Oy. More references can also be found in this chapter.
References:
- T. Welt and R. J. Dinus, “Enzymatic Deinking – A Review.,” IPST Technical Paper Series Number 542., 1994.
- J. H. Ma and C. L. Jiang, “Enzyme Applications in the Pulp and Paper Industry.,” Progress in Paper Recycling, Vol. 11(3), pp. 36-47, 2002.
- P. K. Bajpai, “Solving the Problems of Recycled Fiber Processing with Enzymes.,” BioResources 5(2)., 2010.
- EDT, “Better Results with Enzyme-Based Technologies: Overview.,” 2020. [Online]. Available: https://www.edt-enzymes.com/.
- EDT, “Practical Biotechnology for the Pulp & Paper Industry: Expanding Enzyme Applications.,” 2003.
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This page has been updated 16.11.2021
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