### Ion Exchange Process for Water SofteningA commercial laundry is evaluating the use of an ion exchange process to reduce water hardness. The operation requires a daily flow of 1000 m³ of water, utilizing city water that contains 200 mg/l as CaCO₃ from calcium and 100 mg/l as CaCO₃ from magnesium. The goal is to lower the total hardness to 80 mg/l as CaCO₃.#### Key Parameters:- **Total Hardness Reduction:** From current levels (300 mg/l as CaCO₃) to 80 mg/l.- **Resin Capacity:** Total Hardness (TH) capacity is 60 kg TH/m³ of resin media.- **Hydraulic Loading Rate:** Recommended loading rate is 0.5 m³/min-m².#### Questions for Consideration:(a) **What is the water flow rate (m³/d) that needs to be treated?**(b) **What is the total daily resin volume (m³) required to soften the water?**(c) **What is the area of the exchanger bed needed?**These calculations and considerations are crucial for determining the necessary setup and capacity for the ion exchange system to ensure efficient water softening for the laundry's operations.

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A commercial laundry is considering constructing an ion exchange process to remove hardness from the water. The flow required is 1000 m/day and they use city water which contains 200 mg/1 as CaCO3 of calcium and 100 mg/l as CaCO3 of magnesium. Total hardness should be reduced to 80 mg/1 as CaCO3. The resin has a Total Hardness (TH) capacity of 60 kg TH/m' of media and the recommended hydraulic loading rate is 0.5 m/min-m2. (a) What is the water flow rate (m/d) that need to be treated ? (b) What is the total daily resin volume (m') required to soften the water? And (c) What is the area of exchanger bed needed.

A commercial laundry is considering constructing an ion exchange process to remove hardness from the water. The flow required is 1000 m/day and they use city water which contains 200 mg/1 as CaCO3 of calcium and 100 mg/l as CaCO3 of magnesium. Total hardness should be reduced to 80 mg/1 as CaCO3. The resin has a Total Hardness (TH) capacity of 60 kg TH/m' of media and the recommended hydraulic loading rate is 0.5 m/min-m2. (a) What is the water flow rate (m/d) that need to be treated ? (b) What is the total daily resin volume (m') required to soften the water? And (c) What is the area of exchanger bed needed.

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

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### Ion Exchange Process for Water Softening

A commercial laundry is evaluating the use of an ion exchange process to reduce water hardness. The operation requires a daily flow of 1000 m³ of water, utilizing city water that contains 200 mg/l as CaCO₃ from calcium and 100 mg/l as CaCO₃ from magnesium. The goal is to lower the total hardness to 80 mg/l as CaCO₃.

#### Key Parameters:
- **Total Hardness Reduction:** From current levels (300 mg/l as CaCO₃) to 80 mg/l.
- **Resin Capacity:** Total Hardness (TH) capacity is 60 kg TH/m³ of resin media.
- **Hydraulic Loading Rate:** Recommended loading rate is 0.5 m³/min-m².

#### Questions for Consideration:
(a) **What is the water flow rate (m³/d) that needs to be treated?**

(b) **What is the total daily resin volume (m³) required to soften the water?**

(c) **What is the area of the exchanger bed needed?**

These calculations and considerations are crucial for determining the necessary setup and capacity for the ion exchange system to ensure efficient water softening for the laundry's operations.

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