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Additional techniques for process water treatment
After reading this article you will..
- know that liquid/solid separation process is supported by coagulants (fixatives like Polyamines, PolyDADMAC and similar medium molecular weight / high cationic charged Polymers) and flocculants (Polyacrylamides with ultra-high MW and low cationic charge).
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:
- 160. Blickensdorfer, C. 2008. Defoamers, Air and Gas in Paper Stock Suspensions: Origination, Measurement and Fighting. In: PTS Seminar Efficient Use of Chemical Additives, Munich.
- Blickensdorfer, C. 2008. Defoamers, Air and Gas in Paper Stock Suspensions: Origination, Measurement and Fighting. In: PTS Seminar Efficient Use of Chemical Additives, Munich.
- Dürkes, F. 2000. Slime: Origin, Elimination, Prevention, PTS Seminar Wasserkreisläufe in der Papiererzeugung — Verfahrenstechnik und Mikrobiologie. In: PTS-Manuscript PTS-MS 2017, Munich 2000.
- Bierbaum, S. Improvement of water circuit and paper quality by ozone treatment of partially streams for example of recovered paper grades, In: Research Report, Project 13666, www.ptspaper.de.
- Hutter, A. 2008. Ca-Analytic to solve problems in water circuit and effluent treatment. In: PTS Analytic-Days, Munich.
- Rother, U. 2007. Calc trap — a new technology for calcium elimination from water circuits. In: Wochenblatt für Papierfabrikation, No.18
- Schencker, A. 2004. Overview about technologies and strategies for control of microbiology in paper industry. In: PTS-Seminar Wasserkreisläufe in der Papiererzeugung — Verfahrenstechnik und Mikrobiologie, PTS-Manuscript PTS-MP 417, Munich.
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This page has been updated 15.11.2021