Question

Which filter is normally used in the lime soda treatment plant?

(a) Slow sand filter

(b) Rapid sand filter

(c) Dual media filter

(d) Mixed media filter

The question was posed to me in final exam.

Origin of the question is Lime Soda Process in portion Water Softening of Environmental Engineering

Answer 1

The correct choice is (b) Rapid sand filter

For explanation I would say: The recarbonated water in lime soda treatment plant is passed through the rapid filter to ensure complete clarification.