Birm - Iron & Managanese Removal 1 Cubic Foot **Free Shipping**
Birm® is an efficient and economical method of removing dissolved iron and manganese compounds from raw water supplies.
Birm® acts as an insoluble catalyst to enhance the reaction between dissolved oxygen (D.O.) and the iron compounds.
In ground water the dissolved iron is usually in the ferrous bicarbonate state due to the excess of free carbon dioxide and is not filterable. Birm®, acting as a catalyst between the oxygen and the soluble iron compounds, enhances the oxidation reaction of Fe + + to Fe + + + and produces ferric hydroxide which precipitates and may be easily filtered.
The physical characteristics of Birm® provide an excellent filter media that is easily cleaned by backwashing to remove the precipitant.
Birm® is not consumed in the iron removal operation and therefore offers a tremendous economic advantage over many other iron removal methods.
Other advantages of Birm®:
- Long material life with relatively low attrition loss,
- Wide temperature performance range
- Extremely high removal efficiency.
- Negligible labor costs are involved because Birm does not require chemicals for regeneration, only periodic backwashing is required.
Using Birm® for Iron Removal
It is necessary that the water contain no oil or hydrogen sulfide. Organic matter should not exceed 4-5 ppm, and the D.O. content should be equal to at least 15% of the iron content with a pH of 6.8 or more. If the influent water has a pH of less than 6.8 dissolved chemicals such as Clack Corosex, Calcite or soda ash may be used to raise the pH.
Water having a low D.O. level may be pre-treated by aeration. Chlorination greatly reduces Birm's activity and dosages should be held at minimum.
Using Birm® for Manganese Removal
Birm® may also be used for manganese removal with the same dependability as iron removal. In these applications the water to be treated should have a pH of 8.0-9.0 for best results.
If the water also contains iron, the pH should be below 8.5. High pH conditions may cause the formation of colloidal iron which is very difficult to filter out.
All other conditions remain the same for either manganese or iron removal.
Conditions for Operation:
Alkalinity should be greater than two times the combined sulfate and chloride concentration.
pH should be 7+.
Dissolved Oxygen content must be equal to at least 15% of the iron (or iron and manganese) content.
Bed Depth: 30 to 36 inches.
Backwash bed expansion: 35% to 50%.
Backwash rate: 10 to 12 gallons per minute per square foot for regular Birm.
- No chemicals to purchase for maintenance.
- No regeneration required.
- Iron removal efficiency is very high.
- Only periodic backwashing required.
- Durable material with a long life and a wide temperature range.
- Light in weight: only 44-50 lbs. per cubic foot.
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