continuous rotary filter is required for an industrial process for the filtration of a suspension to produce 0002 m3s filtrate A sample was tested on a small laboratory filter of area 0023 m2 to which it was fed by means of a slurry pump to give filtrate at a constant rate of 00125 ms The pressure difference across the test filter increased from 14 kNm2 after 300 s of filtration to 28 kNm2 after 900 s Calculate the area of the drum filter if the cake thickness had reached 38 mm after 12 s and the vacuum system of the drum was constant at 70 kNm2 across the filter