Manganese Greensand
is formulated from a gluconate greensand, which is capable of reducing iron, manganese and hydrogen sulfide from water through oxidation and filtration. When the oxidizing capacity power of the manganese greensand bed is exhausted, the bed has to be regenerated with a weak potassium permanganate (KMnO4) solution thus restoring the oxidizing capacity of the bed. 1.5 to 2 ounces of potassium permanganate, in solution, per cubic foot of manganese greensand is considered sufficient for normal regeneration. It is required to vigorously backwash and regenerate the bed when it is placed in service and before its oxidation capacity is totally exhausted.
Specification
| Water pH range | 6.2 to 8.5 |
| Bed depth | 30 inches |
| Freeboard | 50% of bed dept (min.) |
| Service flow rate | 3 - 5 gpm/sq. ft2 |
| Backwash flow rate | 10 - 12 gpm/sq. ft2 |
| Backwash expansion rate | 40% of bed depth |
