COD and dissolved inorganic material Chemical oxygen demand (COD) or total organic carbon (TOC) are often considered to be measures of released organic material in white waters. Their concentration is closely dependent on specific water consumption. In the previously referred closed-cycle test referred to above 1, the enrichment of COD in DIP and TMP filtrates
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COD and dissolved and colloidal material
After reading this article you will..
- know how COD and dissolved inorganic material effect recycled pulp quality.
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:
- Ventola, J., Effect of dissolved and colloidal substances on bonding ability of TMP-fibres. M.Sc. Thesis, Helsinki University of Technology, Paper Laboratories, Espoo, Finland, 1997
- Roring, A. and Wackenberg, E., Characterization of deinking white water: influence on flotation and bleaching efficiency: Water’s components affect both flotation and bleaching. Pulp Paper Can. 98(1997) No. 5, p. 17–21
- Krogerus, B., PSC Report No. 71, KCL, Espoo, Finland, 1995
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This page has been updated 16.11.2021
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