Question

When does the pressure difference increase in filtration?

(a) If the constant rate is maintained

(b) If the cake thickness decreases

(c) If the cake thickness increases

(d) There is no pressure difference throughout the process

The question was asked in semester exam.

My query is from Filtration at Constant Pressure Drop in portion Filtration of Food Processing Unit Operations

Answer 1

Right choice is (a) If the constant rate is maintained

The best explanation: As the thickness of the cake increases the resistance to flow of filtrate increases and rate of filtration gradually decreases. If rate is maintained to be constant then pressure difference driving force will increase.