29.7. The following relation between a and Ap for superlight CaCO, has been determined to be a = 8.8 x 10 L1 +3.36 x 10(Ap) 81 where Ap is in pounds force per square foot. This relation is followed...

Extracted text: 29.7. The following relation between a and Ap for superlight CaCO, has been determined to be a = 8.8 x 10 L1 +3.36 x 10(Ap) 81 where Ap is in pounds force per square foot. This relation is followed over a pres- sure range from 0 to 1,000 lb, /in.*. A slurry of this material giving 3.0 lb of cake solid cubic foot of filtrate is to be filtered at a constant pressure drop of 70 lb, /in.* and per a temperature of 70° F. Experiments on this sludge and the filter cloth to be used gave a value of Rm many square feet of filter surface are needed to give 1,400 gal of filtrate in a 1-h filtration? The viscosity is that of water at 70 F. 1.2 x 1010 ft. A pressure filter of the tank type is to be used. How %3D