Consider that you have same module charateristics for each configuration with recovery ratio of 40% and salt rejection ratio of 98%, consider also that the feed mass flow rate is

1 kg/s with a salinity of 42 g/kg for each case. For the cases with recirculation, assume that the recycled equals to 20% and then 80% of the concentrate (or permeate). a.Write clearly the basic equations for ecah configuration b. Find the overall recovery and salt rejection ratio for each configuration. c. For cases with recirculation (case 2,3, 5, 6), analyse the effect of recirculation ratio R on the overall RR and SR. Consider R variation between 10% to 90%.