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Recycling and Deinking of Recovered Paper.
Paper recycling in an increasingly environmentally conscious world is gaining importance. Increased recycling activities are being driven by robust overseas markets as well as domestic demand. Recycled fibers play a very important role today in the global paper industry as a substitute for virgin pu...
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Oxford :
Elsevier,
2013.
|
| Temas: | |
| Acceso en línea: | Texto completo |
MARC
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| 100 | 1 | |a Bajpai, Pratima. | |
| 245 | 1 | 0 | |a Recycling and Deinking of Recovered Paper. |
| 260 | |a Oxford : |b Elsevier, |c 2013. | ||
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| 520 | |a Paper recycling in an increasingly environmentally conscious world is gaining importance. Increased recycling activities are being driven by robust overseas markets as well as domestic demand. Recycled fibers play a very important role today in the global paper industry as a substitute for virgin pulps. Paper recovery rates continue to increase year after year Recycling technologies have been improved in recent years by advances in pulping, flotation deinking and cleaning/screening, resulting in the quality of paper made from secondary fibres approaching that of virgin paper. The process is a lot more eco-friendly than the virgin-papermaking process, using less energy and natural resources, produce less solid waste and fewer atmospheric emissions, and helps to preserve natural resources and landfill space. Currently more than half of the paper is produced from recovered papers. Most of them are used to produce brown grades paper and board but for the last two decades, there is a substantial increase in the use of recovered papers to produce, through deinking, white grades such as newsprint, tissue, market pulp. By using recycled paper, companies can take a significant step toward reducing their overall environmental impacts. This study deals with the scientific and technical advances in recycling and deinking including new developments. Covers in great depth all the aspects of recycling technologies Covers the latest science and technology in recycling Provides up-to-date, authoritative information and cites many mills experiences and pertinent research Includes the use of biotech methods for deinking, refining. and improving drainage. | ||
| 505 | 0 | |a Front Cover -- Recycling and Deinking of Recovered Paper -- Copyright Page -- Contents -- Preface -- 1 Introduction -- 1.1 The Paper and Paperboard Industry in the Global Market -- 1.2 General Aspects of Paper Recycling -- 1.3 Benefits of Recycling -- 1.4 Statistics -- 1.5 Challenges for Paper Recyclers -- 1.5.1 Deinking -- 1.5.2 Adhesives -- 1.5.3 Limited Life Cycle -- References -- 2 Legislation for Use of Recycled Paper -- 2.1 Introduction -- 2.2 Legislation in the European Union -- 2.3 Legislation in Japan -- 2.4 Legislation in the USA -- References -- 3 Collection Systems and Sorting of Recovered Paper -- 3.1 Collection -- 3.2 Sorting, Handling and Storage of Recovered Paper -- References -- 4 Process Steps in Recycled Fibre Processing -- 4.1 Introduction -- 4.2 Process Steps and Equipment -- 4.2.1 Pulping -- 4.2.2 Deflaking -- 4.2.3 Refuse Removal -- 4.2.4 High-Density Cleaning -- 4.2.4.1 Coarse and Fine Screening -- 4.2.5 Flotation -- 4.2.6 Washing -- 4.2.7 Thickening -- 4.2.8 Kneading and Dispersion -- 4.2.9 Fine Cleaning -- 4.2.10 Deinking Processes -- References -- 5 System and Process Design for Different Paper and Board Grades -- 5.1 Introduction -- 5.2 RCF Stock Preparation for Newsprint and Improved Paper Grades -- 5.3 RCF Stock Preparation for Market Pulp Systems -- 5.4 RCF Stock Preparation for Fine Paper System -- 5.5 RCF Stock Preparation for Tissue -- 5.6 RCF Stock Preparation for Test Liner -- References -- 6 Effects of Recycling on Pulp Quality -- 6.1 Introduction -- 6.2 General Effects of Recycling on Papermaking Properties -- 6.3 Factors Influencing Recycling -- 6.4 Techniques to Enhance Strength Properties of Recycled Fibres -- References -- 7 Chemicals Used in Deinking and Their Function -- 7.1 Introduction -- 7.2 Alkali -- 7.3 Stabilisers -- 7.4 Hydrogen Peroxide -- 7.5 Chelating Agents -- 7.6 Surfactants. | |
| 505 | 8 | |a 7.7 Dispersion Agents -- 7.8 Collecting Chemicals -- 7.9 Frothing Agent -- 7.10 Defoamer -- 7.11 Emulsions -- 7.12 Modified Inorganic Particle -- 7.13 Calcium Salts -- References -- 8 Deinking with Enzymes -- 8.1 Introduction -- 8.2 Enzymes Used in Deinking and Their Mechanism -- 8.3 Developments in Enzymatic Deinking -- 8.4 Effects of Enzymes on Fibre, Paper Quality and Pulp Yield -- 8.5 Effects of Enzymes on Effluent Characteristics -- 8.6 Benefits and Limitations -- 8.7 Future Prospects -- References -- 9 Bleaching of Secondary Fibres -- 9.1 Introduction -- 9.2 Chlorine Bleaching -- 9.2.1 Bleaching with Hypochlorite -- 9.3 Chlorine-Free Bleaching -- 9.3.1 Bleaching with Hydrogen Peroxide -- 9.3.2 Bleaching with Dithionite -- 9.3.3 Bleaching with FAS -- 9.3.4 Bleaching with Oxygen -- 9.3.5 Bleaching with Ozone -- 9.3.6 Bleaching with Peroxyacids -- 9.3.7 Direct Borohydride Injection Bleaching -- References -- 10 Refining of Recycled Fibres -- 10.1 Introduction -- 10.2 Refining Effects -- 10.3 Use of Enzymes in Upgrading Secondary Fibre -- References -- 11 Improving Drainability of Recycled Fibres -- 11.1 Introduction -- 11.2 Effect of Enzymes and Chemical Additives on Drainage -- References -- 12 Effects of Recycled Fibre on Paper Machines -- 12.1 Introduction -- 12.2 Effects on Paper Machine Runnability -- 12.2.1 Performance of Enzymatically Deinked Recovered Paper on Paper Machine Runnability -- 12.3 Effect on Sheet Properties -- References -- 13 Control of Stickies -- 13.1 Introduction -- 13.2 Problems -- 13.3 Control -- 13.3.1 Control of Waste Paper Quality -- 13.3.2 Pulping and Deflaking -- 13.3.3 Screening -- 13.3.4 Cleaning -- 13.3.5 Flotation -- 13.3.6 Dispersion and Kneading -- 13.3.7 Chemical Additives -- 13.3.7.1 Talc -- 13.3.7.2 Bentonite -- 13.3.7.3 Diatomite -- 13.3.7.4 Dispersants Mixed with Solvents -- 13.3.7.5 Zirconium Compounds. | |
| 505 | 8 | |a 13.3.7.6 Alum-Sequestering Agents -- 13.3.7.7 Cationic Polymers -- 13.3.7.8 Surfactants -- 13.3.8 Enzymes -- 13.4 Future Prospects -- References -- 14 Water Reuse, Wastewater Treatment and Closed-Cycle Operation -- 14.1 Water Reuse -- 14.2 Wastewater Treatment -- 14.2.1 Aerobic Biological Treatment -- 14.2.2 Anaerobic Biological Treatment -- 14.3 Closed Cycle in Paper Mills Utilising Recycled Fibres -- References -- 15 Environmental Aspects of Recycling -- 15.1 Introduction -- 15.2 Environmental Benefits of Recycled Paper -- 15.3 The Negative Effects of Paper Recycling -- 15.4 Health Dangers Caused by the Use of Recycled Paper -- 15.5 Organochlorine Compounds -- 15.6 Carbon Footprints -- References -- 16 Uses of Recovered Paper Other than Papermaking -- 16.1 Introduction -- 16.2 Biorefinery -- 16.3 Use of Recovered Paper in Construction and Manufacturing -- 16.3.1 Recycled Newspaper in Construction and Manufacturing -- 16.4 Moulded Papers -- 16.5 Recovered Paper as a Fuel -- 16.6 Recovered Paper for Use in Art and Handicraft -- References -- 17 Future of Paper Recycling -- 17.1 Introduction -- 17.2 Issues and Trends Influencing the Availability, Quality and Quantity of Recycled Fibre -- References. | |
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| 650 | 0 | |a Waste paper |x Recycling. | |
| 650 | 6 | |a Vieux papiers |x Recyclage. | |
| 650 | 7 | |a Waste paper |x Recycling |2 fast | |
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