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A water-based slurry of mineral is being filtered under vacuum, with a controlled pressure drop of 50 kPa, through a filter paper of 0.09 m2 . The slurry is at 25 kg solids per m3 fluid. Use µ = 9.0 × 10−4 Pa.s and the following data:
V [L] t [s]
0.5 19
1 41
2 95
3 178
4 280
Calculate the medium resistance, Rm; specific cake resistance, a; and the time to produce 5 liters of filtrate.