General Description of BIRM Filter Media
Birm® is an efficient and economical media for the reduction of dissolved iron and manganese compounds from raw water supplies. It may be used in either gravity-fed or pressurized water treatment systems. Birm acts as an insoluble catalyst to enhance the reaction between dissolved oxygen (D.O.) and iron compounds. In ground waters, 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.
Birm Media Suppliers
City Water Purifier provides Birm media which is specially used for Iron Removal water treatment plants all over Bangladesh. Besides Birm media We Provide all kinds of water treatment media and parts too.
• Under the proper conditions, no chemicals to purchased for maintenance. Regeneration is not required.
• Iron removal efficiency is extremely high.
• Negligible labor cost: only periodic backwashing is required.
• Durable material with a long life and wide temperature range.
• Weighs only 35-40 lbs./cu. ft.
• Color: Black
• Bulk Density: 35-40 lbs./cu. ft.
• Mesh Size: 10 x 40
• Specific Gravity: 2.0 gm/cc
• Effective Size: 0.48 mm
• Uniformity Coefficient: 2.7
CONDITIONS FOR OPERATION
• Alkalinity should be greater than two times the combined sulfate and chloride concentration.
• Maximum water temp: 100oF/38oC
• Water pH range: 6.8-9.0
• Dissolved Oxygen (D.O.) content must be equal to at least 15% of the iron (or iron and manganese) content.
• Bed depth: 30-36 in.
• Freeboard: 50% of bed depth (min.)
• Backwash rate: 10-12 GPM/sq. ft.
• 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
• Hydrogen Sulfide should be removed prior to contact with Birm media
• Oil: None Present
• Polyphosphates: None present