Question

4. A desert resort water system uses a secondhand reverse osmosis process to reduce the concentration of salt in the water sa potable levels. Examine the figure below for the overall process. The reverse osmosis unit produces salt only at a concentration of 100 mg/liter. Determine the value of Fin liters per second and the concentration of salt in the waste brine in mg/liter. Bypass water (B) Blackish water from well F 0.20°F Reverse osmosis resulting Storage tank process 100 mg Salt/Liter Concentrated brine (water brine) 500 mg salt/liter water

Answer 1

By pass Water (B) (10-F) Raw water F Reverse Osmosis 0.27 storage lolit/rec loomg/ 0.8F Saltwater Waste brine Soeng salot Water (sooms/L)

let 10 bith Bec of Blackish water from well enters juto the process Flow rate o Byper (B) = 10-F

Balance @ storage tank to-f t o.2F = W W = 10-0.8f rooomg Let amount of the salt in feed salt balance a storage tank (10-2)* 1000 + 0-24*100 = kl¥500 ► 10-F)* 1000 + 204 = (0–0-84) 500 10000 - 1000f + 204 = 5000 - 4008 F = 8. 62 dit/sec

DO NOT FORGET TO THUMBS UP......IF YOU SATISFIES WITH MY ANSWER....PLEASE LIKE IT.....