Answer to Question #126286 in Other for Bathma

Question #126286

A rotary vacuum filter is available with an area of 200 m^2 and vacuum pressure of 75 kPa. Filter leaf tests have been performed on a cell broth with a viscosity of 5 cP.

The leaf tests gave a specific cake resistance of 1×10^11 cm/g and medium resistance of 1×10^8 cm-1. The cake solids (dry basis) per volume of filtrate was 15 g/L. It is desired to operate the large filter with cycle time of 45 s and a cake formation time of 10 s. What is the filtration rate expected for the rotary vacuum filter? How significant is the resistance medium?



1
Expert's answer
2020-07-14T18:14:39-0400

From the given information, we get the following data:




and the area A can be calculated from;







  • The filtration rate expected for the rotary vacuum filter is;


  • To answer how significant is the resistance medium is;


So, at the end of the filtration,



Therefore the filter medium is contributing very little of the resistance to filtration



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