How does a birm filter work?
A birm filter consists of four main parts: • a composite pressure vessel • a birm filter control valve usually low voltage • birm filter media • an eductor system The water filters down through the birm filter media, up through a riser tube in the centre of the composite pressure vessel and out through the birm filter control valve to service. Oxygen is introduced to the inlet water via an ejector to raise the oxygen level to 15%. This aids the oxidisation of the iron and helps it to precipitate. This, in turn, lets the birm remove the now ferric iron from the water. Periodically, the birm water filter will backwash, which changes the water flow through the birm water filter. The water in the backwash cycle flows in from the inlet, down the centre riser tube, up through the birm media bed and out of the control valve to drain. The next step in a birm iron removal filter regeneration cycle is rinse. The water in a rinse cycle of a birm iron removal filter flows as in service, down throu
