Calculate the theoretical softener resin bed depth for the following data: Magnesium Load: 130 ppm as CaCO3 Capacity: 47 Kg/m3 Correction factor: 0.9 Flow rate: 135 m3/hr Operation hours: 20 hrs Linear velocity: 16.6 m3/h/ m3 Space velocity: 20 m3/h/ m3

Correct Answer: 1.2 m3
Magnesium load= Magnesium as CaCO3 x Flow rate x Operating hours/1000. Resin Volume= Magnesium load/ (Exchange capacity x Correction factor). Resin Volume = /(47 x 0.9)= 1.8 m3. Bed depth = Linear Velocity/Space velocity. Bed depth = 20 /16= 1.2 m.