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Characteristics of Effluents from Gray and Black Water Septic Tanks
Journal (Water Pollution Control Federation)
Vol. 50, No. 11 (Nov., 1978), pp. 2547-2559
Published by: Water Environment Federation
Stable URL: http://www.jstor.org/stable/25040185
Page Count: 13
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The chemical and bacteriological characteristics of septic tank effluents from two separate septic tanks used by one house (which used phosphorus-free detergents) for grey water and black (toilet) wastewater treatment were studied for nine months. The concentrations of total phosphorus and total Kjeldahl nitrogen in the grey water septic tank effluent were 1.4 and 11.3 mg/l respectively, which is 10 times lower than in the toilet wastewater septic tank effluent. However, the average concentrations of the total and fecal coliform organisms in effluent from the grey water septic tank were higher than in the effluent from the toilet septic tank. Sludge accumulation rates and characteristics and the effect of soil filters on removal of chemical and bacteriological contaminants from the septic tank effluents were also discussed.
Journal (Water Pollution Control Federation) © 1978 Water Environment Federation