Detail 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 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 Fe+ + to
Fe+ + + 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 4-5 ppm, the D.O. content equal
at least 15% of the iron content with a pH
of 6.8 or more. If the influent water has a
pH of less that 6.8, neutralizing additives
such as Clack Corosex® , 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.
Clack 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 8.0-9.0 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.
Hubungi Oriental Water Surabaya dan Sidoarjo
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Email : orwaterset@ gmail.com
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