Use of Peat in Septic Tank Effluent Treatment - Column Studies

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Abstract
Studies were undertaken to examine the performance of peat filters under dynamic operating conditions. Five laboratory columns were used to determine the treatment capacity of peat at varying hydraulic and organic loadings. The columns with 200, 250, 300, 350 and 500 mm of peat compacted to a density of 100 kg/m3 were studied treating septic tank effluent. All the columns were dosed at uniform rates of 64 mm/d, 89 mm/d, 115 mm/d and 140 mm/d of septic tank effluent for periods of 14, 16, 10 and 4 weeks respectively. Results of column studies showed SS removal of 85-99%, BOD, COD removals in the 40 to 80% range, TKN removal of 0 to 90% and phosphorus removal of 0 to 25%. In general, excellent ( > 95%) fecal coliform reduction was obtained.

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