An aqueous slurry containing 1.5 lbm of solid per gallon of liquid is pumped through a filter cloth by a centrifugal pump. If the pump provides a constant pressure drop of 150 psig, how long will it take for the filter cake to build up to a thickness of 2 in.? The density of the filter cake is 30 lbm/ft^3 , and its permeability is 0.01 Darcy

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