It is required to design a plate and frame filter press for the separation of water from sludge. To this aim, a laboratory experiment was performed under two constant pressures of 6.7 and 16.2 psig using a similar filter cloth to that intended to use in the filter. The filtration area =0.05 m2. The data are shown in the table. It is intended to filter 200m3 thickened sludge in three hours that contains of 35kg solids per m3 water under a pressure of 12psig. The time of filtration is taken as two hoursand the cake density is 1400kg of solid per cubic meter of wet cake. Find the numberof plates if their filter dimensions measure 2525". Also estimate the thickness of frames