Question

1.3. Calculate c: and c: in kg NaC/m and the membrane area in m if a thin film composite polyamide spiral wound reverse osmosis membrane to be used at 25°C. A NaCl feed solution containing 2.5g NaCl/L (2 5kgNaCl/m2, p 999kg/m2) has a water permeability constant Aw = 4.81x 10 NaCl/s.m2 atm and a solute (NaCi) permeability constant As 4.42x 107 m/s Assume that the cut or fraction recovered of the solvent water will be 0.10 instead of assuming very low water recovery. The concentration of the entering feed solution and exit feed will not be the same. The membrane AP 27 20 atm. The flowrate q: of the permeate water solution is 100 gal/hr. Where: 1m2- 264.17 gal J (23) B(AP-AT R = B An wz 1+ B(AP-Ar) NS64