Question

5. A groundwater containing 50 mg/L of Trichloroethane (TCA) will be treated in a rectangular PFTR reactor as shown below. The reactor is open to atmosphere. The water flows through the reactor with a constant velocity of (V) of 1 m/min. TCA can be removed in PFTR by evaporation and biochemical degradation. For evaporation of TCA, the two-film mass transfer coefficient (KA2) is given as 20 cm/h, while for the biodegradation of TCA, the first-order reaction rate constant (ki) is 0.02 min". According to information given problem, calculate TCA concentration at the end of PFTR (L = 50 m) at steady state conditions. (20p) Evaporation W = 2m H = 5 m (Water height) v = 1 m/min (velocity) TCA + CO2g (degradation) L: 50 m 1