Question: A filter is to be operated as follows:
a. At a constant rate of 2 gal/min until the pressure drop reaches 5 psi, and then
b. At a constant pressure drop of 5 psi to the end of the run.
How long will it take to collect 500 gal of filtrate operating as above? You may make appropriate assumptions. The following data have been taken at a constant rate of 1 gallmin.
