BIRM Media

ADVANTAGES

• Under the proper conditions, no chemicals to purchase for maintenance. Regenerant not required.
• Iron removal efficiency is extremely high.
• Negligible labor cost: only periodic backwashing required.
• Durable material with a long life and wide temperature range.
• Weighs only 36-38 lbs./cu. ft.

CONDITIONS FOR OPERATION

• Alkalinity should be greater than two times the combined sulfate and chloride concentration.
• Temperature Range: 35-100oF
• Water pH range: 6.8-9.0
• Dissolved Oxygen (D.O.) content must be equal to at least 15% of the iron and 29% of the manganese content.
• Bed depth: 30-36 in.
• Maximum Pressure Drop: 2-4 psi (14 -28 kPa) (Δ p increase from clean bed)
• Freeboard: 50% of bed depth (min.)
• Backwash rate: 10-12 gpm/sq. ft.
• Rinse Rate: At service flow rate
• Backwash Bed Expansion: 20-40% of bed depth (min.)
• Service flow rate: 3.5-5 gpm/sq. ft. intermittent flow rates and/or favorable local conditions may allow higher flow rates

INFLUENT AND BACKWASH LIMITATIONS

• Free chlorine concentration less than 0.5 ppm
• Hydrogen Sulfide should be removed prior to contact with Birm media
• Oil: None Present
• Polyphosphates: None present
• Organic Matter: Less than 5 ppm TOC