E
uro-
C
lear
Kft.
Water purification and treatment equipment manufacturer and wholesale distributor
Tel: +36 96 544-240 • Fax: +36 96 544-248 • E-mail: [email protected] • Web: www. euro-clear.eu
BlueSoft Industrial Iron and Manganese Remover
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4. OPERATION OF THE DEVICE
4.1. TYPES OF IRON THAT CAN OCCUR
Iron can be found in three forms in the nature ( Fe; Fe++; Fe+++ ). Manganese can
have 2 forms in the nature ( Mn+; Mn++ ). You can find it in most of volcanic stones,
usually in standstone, in different kinds of clay, and, in smaller extent, it is also part
of carbonate stones. It is important to know in which forms the iron and manganese
to remove can be found, so that you can apply the most economical iron and/or
manganese remover system.
4.2. DESCRIPTION OF THE OPERATION, ITS THEORETICAL BASES
The charges of the removers are usually natural minerals, their main component is
the manganese dioxide. They have been used for more than 75 years in water
treatment. Catalytic filtrating
materials to remove iron reduce the water’s iron,
manganese and hydrogene sulphide content. They function as a catalyst and remain
unchanged.
The iron removers’ charges work as follows: H2S, iron and manganese oxidize and
get stuck on the filtrating material. The filtrating material can get cleaned by a simple
backwash. You do not need to dose any chemical, so nothing is going into the
drinking water
. The iron removers’ charges have a big capacity even when the
pollution has got low concentration.
In order to ensure the adequate bed expansion and long life, it is very
important to backwash
the iron removers’ filter properly as the density is
quite big.
In most cases, dissolved iron in water is usually Fe++. If there is oxygen, in
adequate conditions Fe++ can easily get transformed into Fe+++. ( Fe(OH)3) This is
iron-hydroxide, which gets separated in the form of flaky, red-brown residual and it
gets dissolved in water in a very low extent. Dissolved manganese in water can
usually be found in Mn+ condition.
If there
is oxygen, in adequate conditions, Mn+
can quickly get transformed into Mn++. ( Mn(OH)2 ). This is manganese-hydroxide,
which gets separated in the form of flaky, blackish-brown residual and gets dissolved
in water in a very low extent.
The charge is manganese dioxide on a silicon-dioxide
carrier and it is the catalyzer of the oxidation process. The whole system can be
considered as an oxidizing filter. The manganese dioxide catalyzer increases the
reaction speed between the dissolved oxygen and the Fe++ or the Mn+, and it filters
out the generated residual. During the filtration process, the charge bed gets
saturated with iron residual and after that it needs to be backwashed.
4.3. MECHANICAL OPERATION OF THE DEVICE
While the device is operating, the mechanical operation of the blocked valve ensures
the automatical performance of the water production and regeneration processes.
