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Consider a 50 x 10^6 m^3 lake fed by a polluted stream with a flow rate...

Consider a 50 x 10^6 m^3 lake fed by a polluted stream with a flow rate of 75 m^3/s and a pollutant concentration of 25.5 mg/L. There is also a sewage outfall that discharges 3.0 m^3/s of wastewater with a pollutant concentration of 125 mg/L. Stream and sewage waste have a reaction rate coefficient of 5% per day. Find the steady-state (i.e., effluent) pollutant concentration and flow rate.

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