Strong base anion unit is a vessel in which an ion exchange process takes place. OH¯ ions replace the anions present in TDS to produce demineralized water. The anions present in the water i.e. Cl, SO4, HCO3 and silica etc. are exchanged with OH¯ ions available in the resin and water is demineralized. Therefore, water becomes demineralized resulting in a solution of pure water. When the anion exchanger gets exhausted, it is regenerated with caustic solution to replenish OH¯ ions. They can be operated manually or automatically. They are available as co-flow and countercurrent regeneration units.

APPLICATIONS

1. Strong base anion unit is used for demineralization of water
2. Power plants