Birm® is a granular filter media for the purification of water from soluble iron and manganese compounds.
The Birm® filter media can be used in both pressure and non-pressure water supply systems.
Volume
28.3
L
Real density
2,0
kg/dm³
Effective bead size
0,64–0,72
mm
Bulk density
2,7
kg/dm³
Particles size
0,43–2,0
mm
Linear filtering speed
8,5–12
m/h
Technical characteristics
- Color - black
- Bulk density - 0,64–0,72 kg/dm³
- Real density- 2,0 kg/dm³
- Effective bead size - 0,48 mm
- Uniformity coefficient- 2,7
- Particles size - 0,43–2,0 mm
Operating conditions
- Bed depth - 760–900 mm
- Freeboard - min. 50% of bed depth
- Linear fitering speed- 8,5–12 m/h
- Service flow rate - 8.5...12 m/h
- Backwash rate- 25–29 m/h
- Backwash bed expansion - 20...40% of bed depth (min.)
How it works
Birm acts as a catalyst accelerating the oxidation reaction of Fe2+ to Fe3+ with oxygen dissolved in the water. As a result of the following hydrolysis, insoluble residue Fe(OH)3 is formed, which is removed from the water by filtration.
Removal of the residue filtered in the operating mode from the layer of the media is performed during backwash.
Birm filter media technical data sheet
