Recycling and Deinking of Recovered Paper

• Record Nr.: UNINA9911046729603321
• Autore: Bajpai P (Pratima)
• Pubbl/distr/stampa: San Diego : , : Elsevier, , 2024; ©2024
• ISBN: 9780443238055; 9780443238048
• Edizione: [2nd ed.]
• Descrizione fisica: 1 online resource (396 pages)
• Disciplina: 676.1
• Soggetti: Deinking (Waste paper); Waste paper
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di contenuto: Front Cover -- Recycling and Deinking of Recovered Paper -- Copyright Page -- Contents -- List of figures -- List of tables -- Preface -- Acknowledgments -- 1 Introduction -- 1.1 Introduction -- 1.1.1 The paper and paperboard industry in the global market -- 1.1.2 Paper Recycling Statistics -- 1.1.3 General aspects of paper recycling -- 1.1.4 Benefits of recycling -- 1.1.5 Challenges for paper recyclers -- 1.2 De-inking -- 1.3 Adhesives -- 1.4 Limited life cycle -- References -- 2 Legislation for the 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 Grading, collection systems, and sorting of recovered paper -- 3.1 Waste paper grades for recycling -- 3.1.1 Brown grade or old corrugated containers/cardboards -- 3.1.2 White grade -- 3.1.2.1 Sorted white ledger and office waste -- 3.1.2.2 File stock -- 3.1.2.3 High-grade deinked paper -- 3.1.2.4 Pulp substitutes -- 3.2 Mechanical grade consisting of old newspapers and magazines -- 3.3 Mixed paper grade -- 3.4 Other grades -- 3.4.1 Collection -- 3.4.2 Sorting, handling, and storage of recovered paper -- References -- Further reading -- 4 Process steps in recycled fiber processing -- 4.1 Introduction -- 4.2 History of the deinking process -- 4.3 Process steps and equipments -- 4.3.1 Pulping -- 4.3.2 Deflaking -- 4.3.3 Refuse removal -- 4.3.4 High-density cleaning -- ; 4.3.4.1 Coarse and fine screening -- 4.3.5 Flotation -- 4.3.5.1 Water hardness -- 4.3.5.2 pH -- 4.3.5.3 Consistency -- 4.3.5.4 Particle size -- 4.3.5.5 Dual time -- 4.3.5.6 Temperature -- 4.3.6 Washing -- 4.3.7 Thickening -- 4.3.8 Kneading and dispersion -- 4.3.9 Fine cleaning -- 4.3.10 Deinking processes -- References -- 5 System and process design for different paper and board grades -- 5.1 Introduction.; 5.1.1 Recycled fiber (RCF) stock preparation for newsprint and improved paper grades -- 5.2 RCF stock preparation for market pulp systems -- 5.3 RCF stock preparation for fine paper system -- 5.4 RCF stock preparation for tissue -- 5.5 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 improve the strength properties of recycled fibers -- References -- Further reading -- 7 Chemicals used in deinking and their function -- 7.1 Introduction -- 7.2 Roles of various chemicals in the deinking system -- 7.2.1 Alkali -- 7.2.2 Stabilizers -- 7.2.3 Hydrogen peroxide -- 7.2.4 Chelating agents -- 7.2.5 Surfactants -- 7.2.6 Dispersion agents -- 7.2.7 Collecting chemicals -- 7.2.8 Frothing agent -- 7.2.9 Defoamer -- 7.2.10 Emulsions -- 7.2.11 Modified inorganic particle -- 7.2.12 Calcium salts -- References -- Further reading -- 8 Deinking with enzymes -- 8.1 Introduction -- 8.2 Deinking enzymes and their mechanism -- 8.3 Developments in enzymatic deinking -- 8.4 Effect of enzyme on fiber, paper quality, and pulp yield -- 8.5 Effect of enzyme on effluent characteristics -- 8.6 Benefits and limitations -- 8.7 Future prospects -- References -- 9 Bleaching of secondary fibers -- 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 formamidine sulfinic acid -- 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 fibers -- 10.1 Introduction -- 10.2 Refining effects.; 10.3 Use of enzymes in upgrading secondary fiber -- References -- Further reading -- 11 Improvement of drainability of recycled fibers -- 11.1 Introduction -- 11.2 Effect of enzymes and chemical additives on drainage -- 11.3 Benefits of improving drainage -- References -- Further reading -- 12 Effects of recycled fiber 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 -- Further reading -- 13 Control of stickies -- 13.1 Introduction -- 13.2 Problems -- 13.3 Control -- 13.3.1 Control of wastepaper 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 -- 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 -- Further reading -- 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 utilizing recycled fibers -- References -- Further reading -- 15 Case studies on paper recycling -- 15.1 Diamond standard series chain for paper recycling operation -- 15.2 Paper recycling in Elora Paper Mills Ltd., India -- 15.3 How a Super Cleat ; saved a paper recycling plant time and money -- 15.4 Paper recycling in Malu Paper Mills, India -- 15.5 Vertical recycle paper pulper -- 15.6 DIRK Paper Ltd. UK -- 15.7 Paper recycling in Bazargaon Paper and Pulp Mills, India.; 15.8 Recycling paper-based silicone release liners -- 15.9 Use of the recycled content paper in magazines -- References -- Further reading -- 16 Environmental aspects of recycling -- 16.1 Introduction -- 16.2 Benefits of recycled paper for the environment -- 16.3 The drawbacks of recycling paper -- 16.4 Health risks associated with recycled paper consumption -- 16.5 Organochlorine compounds -- 16.6 Carbon footprints -- 16.7 Evaluation of a recycled paper production's environmental performance using the life cycle assessment method -- References -- Further reading -- 17 Uses of recovered paper other than papermaking -- 17.1 Introduction -- 17.2 Uses of recovered paper -- 17.2.1 Biorefinery -- 17.2.2 Construction and manufacturing -- 17.2.3 Molded papers -- 17.2.4 Fuel -- 17.2.5 Recovered paper for use in art and handicraft -- 17.2.6 Nanocellulose -- 17.2.7 Biohydrogen and biogas -- 17.2.8 Bioethanol -- 17.2.9 Heat by incineration -- 17.2.10 Hydrochar by carbonization -- 17.2.11 Soil amendment by composting -- References -- 18 Future of paper recycling -- 18.1 Introduction -- 18.2 Problems and patterns affecting the amount, quality, and availability of recycled fiber -- References -- Further reading -- Index -- Back Cover.
• Sommario/riassunto: This book, authored by Pratima Bajpai, explores the processes and technologies involved in the recycling and deinking of recovered paper. It delves into various aspects of paper recycling, including legislative frameworks, grading, collection systems, and sorting methods for recovered paper. The book also examines process steps, design systems for different paper grades, and the impact of recycling on pulp quality. Special emphasis is placed on the role of chemicals and enzymes in deinking, as well as the environmental benefits and challenges of paper recycling. This second edition provides updated insights into the field, making it a valuable resource for professionals, researchers, and students in the pulp and paper industry.