Birm

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Birm is an efficient and economical feed for removing dissolved iron and manganese compounds in water.
Birm is a catalyst for the oxidation of iron compounds with oxygen dissolved in water.
Insoluble iron compounds resulting from oxidation are deposited in the feed layer and can be easily filtered off.
Birm is not consumed in the iron removal process and is more economical than other loads.
The physical properties of Birm ensure high-quality filtration and the filter can be easily cleaned of precipitated particles by backwashing. Birm can be used in both pressurized and non-pressurized water purification systems.
Other advantages of using Birm are long load life and low abrasion, wide temperature range of use, and high iron removal efficiency. Unlike other filter media, Birm does not require chemical reagents for recovery, only periodic backwashing is required.
Birm can also be used to remove manganese using the same technology as for iron removal. In this case, the input water should have a pH between 8.0 and 9.0 for good results. If the water contains iron compounds in addition to manganese, then the pH should not exceed 8.5, since a high pH value can cause the formation of hard-to-remove colloidal iron. All other conditions for the removal of manganese are the same as for the removal of iron.

ADVANTAGES

Efficient iron removal No chemical costs.
Regeneration by backwash only.
Solid material with long service life over a wide temperature range.

PHYSICAL PROPERTIES

Color: black Density: 0.7 – 0.8 g / cm3.
Specific gravity: 2.0 g / cm3.
Uniformity Coefficient: 1.96.
Size: 2.0 – 0.42 mm.

CONDITIONS OF APPLICATION

pH of water: 6.8 – 9.0
Alkalinity: twice the sum of the concentration of sulfates and chlorides.
Absence of oil products and hydrogen sulfide.
Permanganate Oxidation: not higher than 4 – 5 mg / l.
The concentration of dissolved oxygen in water is not less than 15% of the iron content in water.
Free chlorine concentration: less than 0.5 mg / l (chlorination of water significantly reduces BIRM activity: high concentrations of chlorine compounds in water can deplete the catalytic coating of the pellets).
Layer height: 75 – 90 cm (30 – 36 inches).
Speed: in service mode: 8.6 – 12 m / h (3.5 – 5 gpm / ft2), under certain conditions may be higher in backwash mode: 24 – 29 m / h (10 – 12 gallon / min / ft2).
Layer expansion: 35 – 50%.