Iron / manganese removal
Demanganisation system GENO-mat MN-Z
Order no. 095 153 048-inter Edited by: nkes-mrie G:\BA-153048-INTER_095_GENO-MAT_MN-Z.DOCX
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3.1
Filters
The raw water flows into the filter tank via the raw water inlet and
then, from top to bottom, through the catalytic filter material. By
means of an oxidation process, dissolved iron and manganese salts
are transformed into insoluble oxides and are deposited on the Fer-
manit material.
In this oxidation process, the Fermanit releases electrons to the iron
and manganese until the supply is exhausted. The electrons have to
be replaced continuously by dosing GENO-oxi plus (refer to product
data sheet).
By dosing oxidants, the oxidation and precipitation of iron and man-
ganese already takes place prior to their contact with the Fermanit
material. Thanks to its catalytic properties a complete oxidation and
due to the excellent filtration characteristics, an optimum filtration are
achieved. The filtered pure water is then directed via the lower dis-
tributing nozzle and the riser pipe through the pure water outlet into
the piping system.
3.2
Backwashing
During the backwash process, the filter bed is forcibly flushed from
bottom to top and thus loosened up. Impurities retained during the
filtration process are washed out via the drain outlet at the control
valve. The demanganisation system must be backwashed every 6
days at the latest (for the setting refer to chapter F).
3.3
First filtrate
By an automatic switch-over of the central control valve, the filter
bed will forcibly be flushed from top to bottom. This first filtrate is dis-
charged to the drain and afterwards, the demanganisation system
GNEO-mat
MN-Z is ready for operation once again.
3.4
Regenera-
tion/disinfection
For operating and hygienic reasons, the demanganisation system
must be regenerated every 6 months with GENO special granulate
or GENO-oxi plus.
3.5
Control unit
The demanganisation system GENO-mat MN-Z is time-controlled
via an electrical timer.
In order to properly use the automatic timer control, the time interval
between two filter sequences (backwash interval in days) must be
set.
