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Determine the filtration constants a and b, where a is the constant characterizing cake resistance related to 1 m2 of filter area in sec/m2, and b characterizes the resistance of the filter medium related to 1 m2 of filter area in sec./m2.

Determine the filtration constants a and b, where a is the constant characterizing cake resistance related to 1 m2 of filter area in sec/m2, and b characterizes the resistance of the filter medium related to 1 m2 of filter area in sec./m2.

27. Using the filtration constants determined from the above question, determine the filtration time of a 5 m3 CaC03 suspension containing 5 % solids on the filter with 10 m2 area. The cake wetness is 40% and the solids density is 2,200 kg/m3. The density of the liquid is 1,000 kg/m3. Also determine the final filtration rate after 2 hrs. of operation.

28. A water suspension is filtered in a media of 50 m2 area at 20° C. Approximately 7 m3 of filtrate was obtained. The filtration constants are a = 1.44 X 106 sec./m2 and b = 9 X 103 sec./m. Determine the washing time at 40° C when the water wash rate is 10 Liter/m2.

29. A suspension of 18 % solids is filtered over an area of 50 m2. The cake's moisture content (by weight) is 40 %. Determine the cake thickness if the filtration and washing time is 10 hrs. The wash water's volume is l/5th that of the filtrate volume, and the filtration constants are as follows: a = 1.10 X 103 sec./m2 and b = 2.15 X 103 sec./m. The densities of the solid and liquid phases are 3,100 kg/m3 and 1,000 kg/m3, respectively.

30. Size a Nutsch filter for processing a suspension containing 15 % solids. The desired cake wetness is 45 % and the filter capacity for the filtrate should be 5 m3/hr. The allowable pressure drop is 500 mm Hg. The cake specific resistance is r0 = 9 X 1011 m"2 and the filter plate resistance is Rf = 2 x 109

m'1. Solid and liquid phase densities are 2,100 kg/m3 and 1,000 kg/m3, respectively. The cake can be washed with water at 20° C using 1 kg of water

31. For the above question, identify a suitable vendor and develop a cost estimate for this machine, including controls and installation.

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