Filtration

Filtration

Slurry of talc and water contains 75% water by weight. If 80% of the of the original water is removed and 600 kg of filter cake is obtained. Calculate the original weight of the slurry. OMB: F = W + Fc OMB: F = W + 600

Water balance: W = 0.80 (0.75)F W = 0.60 F F = 0.60F + 600

Solution: 0.8

Water

Feed 0.75 water Fc= 600

F= 1500 W= 900

water is removed

= W + 600

Filtration

Saturated solution of a salt is made by agitating 600 kg of salt in 1200 kg of water. The salt is soluble to the extent of On filtration, 0.40 kg of solution adheres to every kilogram of undissolved salt. Calculate the weight of the filtrate. Solution:

Wt. of dissolved salt = 1200 kg water x (0.25 kg salt/1 kg water) = 300 Wt. of saturated solution = 1200 kg water x (1.25 kg solution/1 kg water) = 1500 Wt. of undissolved salt = 300 Wt. of adhering sol’n = 120 Filter cake = Adhering solution + undissolved solution Fc= 420

FL = saturated solution – adhering solution FL= 1380

(kg of Filtrate)

e salt is soluble to the extent of 0.25 kg per kg of water. ate the weight of the filtrate.