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Deinking and Fiber Recycling

Table of Contents

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Unit 1 Recovered / Recycled Fiber Sources

1.1    Pre-Consumer / Post Consumer Waste
1.2    Sources, Collection Systems
1.3    Sorting of Recovered Paper
1.4    Recovered Paper Grades
        1.4.1    Packaging Grades
        1.4.2    Fine papers
        1.4.3    Newsprint
1.5    Quality control and recyclability

Unit 2 Operations and Equipment in Recycled Fiber Processing

2.1    Pulping
2.2    Deflaking
2.3    Screening
2.4    Fractionation
2.5    Centrifugal cleaning
2.6    Floatation
2.7    Dewatering
2.8    Washing
2.9    Dispersion and Kneading
2.10   Refining
2.11   Mixing and Pulp Storage

Unit 3 Pulp Deinking and Bleaching

3.1    Chemistry of Deinking
3.2    Deinkability of Printing Inks
3.3    Chemistry of Bleaching
        3.3.1    Lignin-Containing Grades
        3.3.2    Lignin-Free Grades

Unit 4 Considerations on the machine

4.1    Forming Fabric
        4.1.1    Anti-contaminant Fabric Designs and Treatments
        4.1.2    Types of Contaminants
        4.1.3    Cleaning of Forming Fabrics
        4.1.4    Cleaning Agents

4.2    Press Fabric
        4.2.1    Anti-contaminant Fabric Designs and Treatments
        4.2.2    Cleaning of Press Fabrics
        4.2.3    Cleaning Agents

4.3    Dryer Fabric
        4.3.1    Anti-contaminant Fabric Designs and Treatments
        4.3.2    Types of Contaminants
        4.3.3    Cleaning Dryer Fabrics
        4.3.4    Cleaning Agents

4.4    Contaminant Deposits at Uhle Box
        4.4.1    Uhle Box Showering
        4.4.2    Diagnostics

4.5    Roll Contamination
        4.5.1    Process Roll Showering
        4.5.2    Process Roll Doctoring

4.6    Contaminants On Dryer Cylinder Surfaces
        4.6.1    Types of Deposits on Dryer Cylinders
        4.6.2    Dryer Cylinder Doctoring

4.7    Cleaning and Scraping
        4.7.1    Roll Cleaning
        4.7.2    Roll Scraping
        4.7.3    Dryer Cylinder Scraping

Unit 5 Design of Recycled Fiber Processes for Different Paper and Board Grades

5.1    Fiber Recovery Process
        5.1.1    Categories of Recovered Fiber Sources
        5.1.2    Paper Grades and Their Characteristics
        5.1.3    The Deinking Process

5.2    Newsprint, Light Weight Coated (LWC) and Super Calendered (SC) Grades
        5.2.1    Raw Material
        5.2.2    Newsprint Recovery Process
        5.2.3    Newsprint Process Description Loop I
        5.2.4    Newsprint Process Description Loop II
        5.2.5    Paper Machine Loop
        5.2.6    Physical Properties
        5.2.7    Peripheral Systems
        5.2.8    Water Management
        5.2.9    Process Water Clarification

5.3    Printing and Writing
        5.3.1    Raw Material
        5.3.2    Recovery Process for White Papers

5.4    Market Pulp
        5.4.1    Raw Material
        5.4.2    Recovery Process for Market Pulp

5.5    Tissue
        5.5.1    Raw Material
        5.5.2    Recovery Process

5.6    Tissue
        5.6.1    Raw Material
        5.6.2    Linerboard, also called Test Liner
        5.6.3    Preparation Strategies
        5.6.4    Disposal of Effluent And Waste
        5.6.5    Corrugating Medium
        5.6.6    White Top Liner

5.7    Folding Boxboard
        5.7.1    Raw Material
        5.7.2    Recovery Process

Unit 6 Managing Waste From Recovered Paper Processing and Non-Recycled Paper Products

6.1    Uses And Disposal Of Final Paper Mill Residue
6.2    Rejects Dewatering And Drying Followed By Energy Recovery
6.3    Composting, Agricultural Use, Cement Production, Brick Manufacturing, Landfill, Wet          Oxidation, Fermentation, Pyrolysis, Hydrolysis And Absorbent Material
6.4    Filler Recovery

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