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A laboratory investigation was carried out to evaluate and compare the perfor mances of three plastic medium upflow anaerobic filters operating at 12.5?1?C, 21?1?Cand30?1?C,treatingdairy wastewater. Twoof the reactors were started at 21?1?C and the third at 30?1?C.Steady-state operation of the three reactors was carried out at three different tem peratures, 12.5?1?C, 21?1?C and30?1?C respectively. Each reactor was operated sequentially at different HRTs (6d, 4d, 3d, 2d and ld). The difference in start-up performance (COD removal) between anaer obicfilters operating at21?1?C and30?1?C wasnotsubstantial. Atan HRT of 4 days, COD removals in the three anaerobic filters were approximately 92%, 85% and 78% at 30?1?C, 21?1?C and 12.5?1?C respectively.
T. Viraraghavan and S.R. Kikkeri 1991. DAIRY WASTEWATER TREATMENT USING ANAEROBIC FILTERS. Canadian Agricultural Engineering 33(1):143-149.
Canadian Society for Bioengineering