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Waste Management & Research, Vol. 19, No. 4, 354-365 (2001)

A solid waste audit and directions for waste reduction at the University of British Columbia, Canada

Melissa A. J. Felder

Waste Management Division, University of British Columbia, Vancouver, British Columbia, Canada

Royann J. Petrell

Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia, Canada

Sheldon J. B. Duff

Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia, Canada, sduff{at}chml.ubc.ca

A novel design for a solid waste audit was developed and applied to the University of British Columbia, Canada, in 1998. This audit was designed to determine the characteristics of the residual solid waste generated by the campus and provide directions for waste reduction. The methodology was constructed to address complications in solid waste sampling, including spatial and temporal variation in waste, extrapolation from the study area, and study validation. Accounting for spatial effects decreased the variation in calculating total waste loads. Additionally, collecting information on user flow provided a means to decrease daily variation in solid waste and allow extrapolation over time and space. The total annual waste estimated from the experimental design was compared to documented values and was found to differ by -18%. The majority of this discrepancy was likely attributable to the unauthorised disposal of construction and demolition waste. Several options were proposed to address waste minimisation goals. These included: enhancing the current recycling program, source reduction of plastic materials, and/or diverting organic material to composting (maximum diversion: ~320, ~270, and ~1510 t yr-1, respectively). The greatest diversion by weight would be accomplished through the diversion of organic material, as it was estimated to comprise 70% of the projected waste stream. The audit methodology designed is most appropriate for facilities/regions that have a separate collection system for seasonal wastes and have a means for tracking user flow.

Key Words: Waste audit • waste characterisation • waste stream analysis • waste variability • waste reduction • waste management • composting • University of British Columbia • Canada


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