Question

What is rate of filtration?

(a) Pressure of filtrate per unit volume

(b) Volume of filtrate collected per unit time

(c) Pressure of filtrate per unit time

(d) Volume of solution per unit time

The question was posed to me in an interview for job.

The question is from Filtration at Constant Volumetric Flow in chapter Filtration of Food Processing Unit Operations

Answer 1

Right answer is (b) Volume of filtrate collected per unit time

For explanation: As the filter medium is penetrable only to the fluid, it retains the solid particles and permits only the fluid to pass through medium which is collected as the filtrate. The volume of filtrate collected per unit time is known as the rate of filtration.