Steady-state concentration of pollutant in lagoon effluent

Reference no: EM13536049

A well-mixed sewage lagoon (a shallow pond) is receiving 430 m3- d-1 of sewage out of a sewer pipe. The lagoon has a surface area of 10 ha (hectares) and a depth of 1.0 m. The pollutant concentration in the raw sewage discharging into the lagoon is 180 mg-L-1 . The organic matter in the sewage degrades biologically (decays) in the lagoon according to first-order kinetics. The reaction rate constant (decay coefficient) is 0.70 d-1. Assuming no other water losses or gains (evaporation, seepage, or rainfall) and that the lagoon is completely mixed, find the steady-state concentration of the pollutant in the lagoon effluent.

Reference no: EM13536049

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