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ENVE 4410/5510 INTRODUCTION TO ENVIRONMENTAL ENGINEERING Problem Set No. 8 lon Exchange Process The raw water contains 250 mg/L of hardness as CaCO3. A final hardness from a softener is 50 mg/L as CacOs. The water softener contains a total 20 m3 ofion-exchange resin that has an exchange capacity of 65 kg of hardness as CaCO; per m resin. The hardness removal efficiency of the softener is 95%. The occupants use 300 mld of water. 1) How much water should be bypassed (in m/d)? 2) What is the breakthrough time, time between the regeneration cycle (in hrs)?
engineering   Civil-Engineering   
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arlHig mais ealan of naidneas esua ttatota tseated 2 508by pass t 25四tinted toro balan ce eauatusn 2 2 50 Q 50x 300 by Pass -t 5x300 =15000 25 oy pass

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