A dialysis process is carried out using a membrane 0.012 mm thick and an area of 1.5 m2. The mass-transfer coefficient on the blood side is estimated as kc1 =1.25X10-5 m/s and in the dialysis, fluid is 3.33X10-5 m/s. The permeability of the membrane is 8.73X10-6 m/s. The concentration of the urea in the blood is 3.3 x 10-6 g urea/ mL and that in the dialyzing fluid will be assumed as 0.

A) Calculate the flux and the rate of removal of urea at steady state in g/h

B) Calculate the time required to remove 90% of the urea from the blood.

C) Calculate the required area to decrease this time 50%. Explain your answers.