Calculate steady-state pollutant concentration in the lake

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Reference no: EM131264632

A small lake with volume 20.0 x 10³ m³) has no natural pollutant sources. However, a sewage pipe discharges sewage containing a pollutant into the lake. Conditions in the sewage pipe ate Qs = 0.5 m³/s, and Cs = 100.0 mg/L The pollutant is destroyed in the lake with a first-order rate constant of 0.2Wday. The flow rate out of the lake is 5.0 m³/s. Assume that the lake is well-mixed.

(a) Calculate the steady-state pollutant concentration in the lake.

(b) What is the retention time for this lake?

Reference no: EM131264632

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