Abstract
Abstract A 4-month study of pilot-scale anaerobic filters was conducted on the treatment of leachate generated from the Beare Road Landfill site in Metropolitan Toronto. The study examined filter performance in both upflow and downflow modes of operation using two types of support media, via plastic biorings and granite stones. No significant difference in removal efficiences, quantity of gas produced and its methane content, was found between upflow and downflow anaerobic filters nor between the plastic biorings and the granite stone media. An efficiency of 66-72% COD removal was achieved at a hydraulic detention time as low as 12 hours. The total gas production ranged between 400-500 L/kg COD destroyed. Methane content in the gas remained between 80-84%.
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