please don't provide other website answers 486. What factors influence the performance of membrane filtration?
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Scale-up of a Rotary Vacuum Filter A rotary vacuum filter is available with an area of 200 m2 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 × 1011 cm/g and a medium resistance of 1 × 108 cm?1. The cake solids (dry basis) per volume of filtrate was 15 g/liter. It is desired to operate the large filter with a 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 medium resistance?
0 Time Required for Ultrafiltration A protein solution at a concentration of 0.5 g/ liter and volume of 1000 liters must be concentrated on a crossflow ultrafilter to a concentration of 10 g/liter. The ultrafilter has an area of 100 m2 and operates at 5°C with an inlet feed pressure of 16.0 bar, outlet feed pressure of 14.0 bar, and back pressure on the permeate of 1.4 bar. The protein has a molecular weight of 20,000 Da and will not pass through the ultrafiltration membranes. The feed has a viscosity of 1.2 cp. The membrane resistance (Rm) of the ultrafilter has been determined to be 2 × 1013 cm?1. The Reynolds number for flow within the ultrafilter is large enough to render concentration polarization negligible. Determine the time required to perform the ultrafiltration.
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