The total flow at a wastewater treatment plant is 682 m3/day.The purpose of the plant is to remove compound Z from thewastewater by treating it in reactors, using a newly developedmicrobial process. Assume the microbial treatment can be modeled asa first order reaction with a rate coefficient of 0.36/h. Supposethe flow is split evenly and treated in two parallel reactors– onecomplete mix and one plug flow -- each with a volume of 88 x 103 L.The effluent from the two reactors are then combined and dischargedfrom the plant. If the influent concentration of Z is 139 mg/L,what is the steady state effluent concentration from the treatmentplant?
