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A wastewater is to be disinfected with 28 mg/l of chlorine to obtain 99.9% kill of micro-organisms. The number of micro-organisms remaining at the time t is given by mathematical expression. Nt=N0e−0.13t where N0 is initial concentration of micro-organisms and t is time in minutes. The waste water flow rate is 0.015 m3/sec If the depth of chlorination tank is 1.5 m, the diameter of chlorination tank is 1.5 m, the diameter of chlorination tank is m.6.3

Answer» A wastewater is to be disinfected with 28 mg/l of chlorine to obtain 99.9% kill of micro-organisms. The number of micro-organisms remaining at the time t is given by mathematical expression. Nt=N0e0.13t where N0 is initial concentration of micro-organisms and t is time in minutes. The waste water flow rate is 0.015 m3/sec If the depth of chlorination tank is 1.5 m, the diameter of chlorination tank is 1.5 m, the diameter of chlorination tank is m.
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