Ion exchange resins are __

What is a recovery?

The direction of water in filter beds is reversed for __

What is the hydraulic loading rate in m2/m3/h of a cloth disc filter assumed while designing it?

What is the most effective dosage of chlorine to be used as a disinfectant?

The area ____ the breakthrough curve is equal to the maximum amount of ions removed by the column.

_____ is added to hard water to make it softer.

Injector of chlorine feed is also called as _____