Title: Potential utilisation of pulp and paper mill biosolids in composting and plant production: a case study at St. Marys Papers Ltd. (Canada)
Authors: Pascale Champagne; Trisha Westman
Department of Civil Engineering, Queen's University, 58 University Avenue, Kingston, ON, K7L 3N6, Canada
Department of Civil and Environmental Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
Abstract: The use of St Marys Paper biosolids as a soil additive or growth cover was investigated. Biosolids were mixed with a commercial potting media in five vol/vol ratios and employed in a greenhouse study. The biosolids were found to improve Pinus banksiana seedling growth, a 50% biosolids:50% ProMix mixture yielding the tallest plants and highest dry mass. To further biologically stabilise the biosolids, in-vessel composting studies were undertaken. Results indicated that a 3 parts biosolids:1 part wood chips:1 part sawdust mixture and initial C : N ratio of 30 sustained thermophilic conditions for 12 days reaching a maximum temperature of 52°C and final C : N ratio of 21.
Keywords: composting; biosolids; sludge; pulp and paper mills; metals; nutrients; carbon to nitrogen ratio; growth study; biostabilisation; Canada; potting media; seedling growth; waste management.
Int. J. of Environment and Waste Management, 2012 Vol.10, No.2/3, pp.118 - 132
Available online: 01 Aug 2012