Welcome- Themes
- Introduction to forest-based bioeconomy
- Wood products
- Natural fibre products
- Man-made bio-based fibre products
- Bio-based nanomaterials
- Recycled fibre
- Pulping and biorefining
- Energy and biofuels
- Biomass chemistry and physiology
- Material testing and product properties
- Forests and other biomass resources
- Supply chain
- Process control and automation
- Asset management
- Business and investment planning
- Environmental control and management
- Learning paths
- Other resources
- Tools
- Contact
- Profile
Unit operations and equipment in recycled fibre processing
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:
Professor Samuel Schabel, TU Darmstadt
References:
- C. P. J. Bennington, R. J. K. a. J. R. G.: The yield stress of fibres suspensions. – In: The Canadian Journal of Chemical Engineering. – 68(1990)10. – S. 748-756
- Fischer, S. A. 1997. Repulping of wet-strength paper. Tappi Journal. Vol. 80, no. 11, p. 141-147.
- Holik, H. 1988. Towards a better understanding of the defibering process. ln: TAPP/ Engineering conference. Chicago, IL, Sept. 19-22, 1988. Atlanta, GA. Tappi Press. p. 223-232.
- Nesbit, S. E. 1999. Flexographic Ink Behaviour During Newspaper Repulping. Dissertation. University of British Columbia, Vancouver.- https:l/dspace.library. ubc. ca/hand/e/2429/9903.
- Siewert, W 1984. Die Auflösetechnologie im Stoffdichtebereich um 15% und ihre Ergebnisse. Das Papier. Vol. 37, no. 7, p. 313-319.
- Krebs, J 1993: Auflösesystem für Sekundärrohstoffe. Wochenblatt für Papierfabrikation, Vol. 121, No. 5, p. 157 – 161.
- J.M. Voith GmbH & Co. KG, Heidenheim, Germany
- Andritz AG, Graz, Austria
- Noss AB, Norrköping, Sweden.
- S. Schabel, P. Respondek: “Sortierung – ein Werkzeug zur Sticky-Entfernung“ – In: Wochenblatt für Papierfabrikation Vol 125, No. 16 (1997), p. 736 – 739.
- O. Heise, B. Cao and S. Schabel: “A novel application of TAPPI T 277 to determine macro stickies disintegration and agglomeration in the recycle process” In: TAPPI Recycling Symposium, Washington, D. C., 2000, TAPPI press, p. 631 – 644, ISBN 0-89852-960-3.
- R. Rienecker, S. Schabe, P. Schweiss: “Screening a tool for stickies removal”, Voith Sulzer Brochure St.SD.05.0003, Ravensburg, 1997, Voith Sulzer.
Videos
Exercises
This page has been updated 27.11.2021