NORDIC PULP & PAPER RESEARCH JOURNAL
Home » Volume 32, 2017 » Issue No. 4
MECHANICAL PULPING
Upgrading waste whitewater fines from a pinus radiata thermomechanical pulping mill
Thilina Gunawardhana, Paul Banham, Desmond E. Richardson, Antonio F. Patti and Warren Batchelor
Abstract
The pulp and paper industry is very efficient in utilizing its wood resource. However, due to the large amounts of resource used, waste from pulp and paper industry is significant in both its quantity and the opportunities it provides. However, fibrous waste has typically only been used for heat recovery, direct land application or separated and sent to landfill. In this study, two options were investigated for utilising fine fibrous waste recovered by Dissolved Air Flotation (DAF) treatment of effluent from a thermomechanical pulping mill. 3000 kWh/t of mechanical treatment of the waste fibres increased the sheet strength from 28 Nm/g to 40.5 Nm/g, which is high enough to reuse these fibres within the mill by recycling them back into the main process stream. Additional high-pressure homogenization is capable of producing hydrophobic nanoscale (10 20 nm) fibrils, which could be used in special applications such as bio-nano-composites with non-polar matrices.
Keywords
Homogenization, Lignocellulose microfibrils, Pinus radiata, Refining, Thermomechanical pulp, Upgrading, Valorisation
Pages
656-665
DOI
10.3183/NPPRJ-2017-32-04-p656-665
Price
22 EUR (excl. VAT) Buy PDF
Nordic Pulp & Paper Research Journal (NPPRJ) is an international scientific magazine covering science and technology for the areas of wood or bio-mass constituents, pulp and paper and including new fiber-based materials, recovery and by-products from pulping processes, bio-refining and energy issues. Articles meeting required scientific standards are accepted from any continent.
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ISSN: 0283-2631