Aquatek ATCBF-AS Manuel d'utilisation et d'entretien - Page 7

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United Water Inc. CR Series Media
Pg 2 of 3
CR 26
Iron, Manganese, Hydrogen Sulfide and Arsenic Removal Media
Operating Suggestions (POE Systems)
8 to 10 ppm feed iron
Bed depth:
Maximum flow rate:
Backwash velocity:
Backwash time:
Bed expansion:
Backwash frequency:
5 to 7 ppm feed iron
Bed depth:
Maximum flow rate:
Backwash velocity:
Backwash time:
Bed expansion:
Backwash frequency:
1 to 5 ppm feed iron
Bed depth:
Maximum flow rate:
Backwash velocity:
Backwash time:
Bed expansion:
Backwash frequency:
110
100
90
80
70
60
50
40
30
20
10
0
0
1
2
3
Backwash water flow rate, US GPM/SQ FT
*Fig. 1 Bed expansion vs. backwash flow rate for various water temperatures
United Water Inc. • 12427 NE 117th Ave • Vancouver, WA 98662
877-414-7873 • Fax 877-669-1069 • [email protected]
These suggestions and data are based on information we believe to be reliable. They are offered in good faith. However, we do not make any guarantee or warranty.
We caution against using these products in an unsafe manner or in violation of any patents. Further, we assume no liability for the consequences of such actions.
30"
2.0 US GPM per cubic foot
resin
5.0 to 6.0 US GPM per
square foot resin at 50°F*
10 to 15 minutes
30 to 40%
Daily
30"
2.5 US GPM per cubic foot
resin
5.0 to 6.0 US GPM per
square foot resin at 50°F*
10 to 15 minutes
30 to 40%
Daily
30"
4.0 US GPM per cubic foot
resin
5.0 to 6.0 US GPM per
square foot resin at 50°F*
10 to 15 minutes
30 to 40%
Daily
40°F
60
°F
80°F
4
5
6
7
8
9
10
UNITED WATER INC.
A
AtCBF-AS-S
quAtek
CR 26 General Guidelines
1
. The media can treat water having an iron content
above 10 ppm, but the process is not economical
particularly for large flow rates. Hence it is recom-
mended to remove iron by pretreating the water by
aeration, followed by clarification and filtration. CR 26
shall then be used as a polishing media.
. Free chlorine should be removed before
passing water through the media.
. The treated water from CR 26 will have an iron
content of <0.1 ppm.
. CR 26 removes dissolved iron from water,
which is present as ferrous iron. Iron can also exist
in other forms such as bacterial iron, soluble
organic iron and colloidal iron. Those forms of
iron cannot be removed effectively by CR 26.
. All sequestering agents including
polyphosphates and meta-phosphates should be
added after the CR 26 unit.
. For high iron content in feed water (> 10 ppm),
it is recommended to backwash the unit with
treated water, so as to avoid contamination of
bottom portion of the bed.
. The unit must be backwashed at specified flow
rate for effective removal of precipitated iron and
suspended solids.
. The backwash frequency shall be every 24 to
48 hours for continuous operating unit. If the unit
is operated intermittently, backwash at the end of
each cycle.
u
G
erieS
Ser
uide
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