birm media

Product Description

TRIHIGH Birm is an efficient and economical media for the reduction of dissolved iron and manganese
compounds from raw water supplies.
Remove Iron:
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 the 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 Fe2+
to Fe3+ and produces ferric hydroxide which precipitates and may be easily filtered.
The physical characteristics of Birm provide an excellent filter media which is easily cleaned by backwashing to
remove the precipitant. Birm is not consumed in the iron removal operation and therefore offers a tremendous
economic advantage over many other iron removal methods.
Other advantages of Birm include; long material life with relatively low attrition loss, a wide temperature
performance range and extremely high removal efficiency. Negligible labor costs are involved because Birm does
not require chemicals for regeneration, only periodic backwashing is required.
When using Birm for iron removal, it is necessary that the water: contain no oil or hydrogen sulfide, organic matter
not to exceed **5 ppm, the D.O. content equal at least *5% of the iron content with a pH of 6.8 or more. If the
influent water has a pH of less that 7.0. Calcite or soda ash may be used prior to the Birm filter to raise the pH. A
water having a low D.O. level may be pretreated by aeration.
Additions of chemicals to influent or backwash water which contacts Birm media may inhibit iron or
manganese removal or may break down or coat Birm media. Chlorination greatly reduces Birm’s activity.
High concentrations of chlorine compounds may deplete the catalytic coating. Polyphosphates are
known to coat Birm and reduce Birm’s ability to remove iron or manganese. Before adding any chemical
to the influent or backwash water, the chemical's compatibility with Birm should be thoroughly tested
Remobe Mn.
TRIHIGH Birm may also be used for manganese reduction with the same dependability as iron removal. In these
applications the water to be treated should have a pH of 8.**9.0 for best results. If the water also contains iron,
the pH should be below 8.5. High pH conditions may cause the formulation of colloidal iron which is very difficult
to filter out. All other conditions remain the same for either manganese or iron removal.