Birm is a relatively inexpensive material which can be used for iron and manganese removal by oxidation. It requires a pH of 7 or more for Iron removal and pH 8 for manganese removal (it uses dissolved oxygen in the water to oxidise the metal). As it acts a catalyst it is not consumed so Birm doesn’t requirere generating or topping up. Birm also has the advantage of acting as a filter, removing turbidity. If the pH of the water is too low pH correction may be required. Media life expectancy is 2 to 3 years.
Specification
| Valve |
Size |
Volume |
Max Service Flow |
Backwash Flow |
| Autotrol 263 |
10x54 |
1.5 Cuft |
0.6m³/hr |
1.1m³/hr |
| Autotrol 263 |
12x52 |
2 Cuft |
0.9m³/hr |
1.8m³/hr |
| Autotrol 263 |
13x54 |
2.5 Cuft |
1m³/hr |
2m³/hr |
| Autotrol 263 |
14x65 |
3 Cuft |
1.2m³/hr |
2.3m³/hr |
| Autotrol 263 |
16x65 |
3.5 Cuft |
1.6m³/hr |
3.4m³/hr |
| Autotrol 263 |
18x65 |
5 Cuft |
2m³/hr |
3.9m³/hr |
Iron Removal Criteria
pH: 7 - 8.5 ( High pH conditions may cause the formulation of colloidal iron which is very difficult to filter out)
Alkalinity: greater than twice the combined sulphate and chloride
Organic matter: <4-5 ppm
Dissolved oxygen: at least 15% of the iron or manganese content less than 0.5% chlorine, no H2S, oil or polyphosphates
Max. Temperature 38C
