One-parameter model To acquaint the reader with the statistical procedure, a greatly simplified model in the first step is used to calculate the number of recycling loops or generations of recycled fibres and their proportions in a furnish for the production of recycled fibre containing paper as shown in Figure 1. This model uses the following
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One-parameter model
After reading this article you will..
- know the basic mathematical principle of an easy one parameter model for fibre age modelling.
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
Author:
Hans Putz
References:
- Hunold, M., Experimentelle und theoretische Untersuchungen über quantitative und qualitative Auswirkungen steigender Altpapier‑Einsatzquoten auf das Recyclingsystem Papier‑Altpapier. Ph.D. Thesis, Technische Universität Darmstadt, Darmstadt, Germany, 1997
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This page has been updated 16.11.2021
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