Question

Sea water is desalinated by reverse osmosis as shown in Figure I. All the compositions are on a mass basis and all flow rate in kg/h. Taking the 1000 kg/h of wet solid as fresh feed that admitted to the process, the recycle flow rate in kg/h is: Recycle water (kg/h Fresh sea water feed, 2% salt Mixed Water, 3.5% Salt Mixer Waste brine water, 5% salt RO unit Desalinated water, 0.05 % salt​

Answer 1

Answer:

500 ppm =0.05%=0.05/100 =0.0005 mass fraction b) Recycle (R) and Waste (W ) will have same composition. Hence salt in Recylce= 5.25% Feed =1000 kg/hr and contains salt at 3.1% salt entering = 1000*3.