A lagoon with volume of 1200 m3 has been receiving asteady flow of a conservative (inert) waste at a rate of 100m3 /day for a long enough time to assume thatsteady-state conditions apply. The waste entering the lagoon has aconcentration of 10 mg/L.
a) What would be the concentration of pollutant in the effluentleaving the lagoon?
b) If the input waste concentration suddenly increased to 100mg/L, what would the concentration in the effluent be 7 dayslater?
