Mixed bed demineralizer plant embodies a single column unit in which strong cation & strong anion resins are intimately mixed together. Water passing through the column comes repeatedly in contact with these resins and is thus in effect subjected almost infinite number of demineralizing stages. Demineral water of extreme purity is produced - Purity that can not be produced by any other commercial method.
 Mixed bed resins are regenerated with acid and alkali but the ion exchange resin must be separated before this can be done.

1.1 Quality of water
A typical quality of mixed bed treated water is as follows 
Conductivity at 25OC   <1 micro siemens /cm
Silica max                      0.05 ppm as CaCO3
Total electrolyte             < 0.5. mg/ litre 
Total hardness                Nil
pH                                  6.8 ---7.2