| CQ-IGS is formulated
from a glauconite green sand which is capable of Reducing Iron, Manganese
and Hydrogen Sulfide from water through oxidation and filtration. Soluble
iron and manganese are oxidized and precipitated by contact with higher oxides
of manganese on the CQ-IGS granules. The hydrogen sulfide is reduced by oxidation
to an insoluble sulfur precipitate. Precipitates are then filtered and removed
by backwashing. When the oxidizing capacity power of the CQ-IGS bed is exhausted,
the bed has to be regenerated with a weak potassium permanganate (KMnO4)
solution, thus restoring the oxidizing capacity of the bed. 1½ to 2
ounces of potassium permanganate, in solution, per cubic foot of CQ-IGS is
considered sufficient for normal regeneration. It is required to vigorously
backwash and regenerate the bed when it is placed in service and before its
oxidation capacity is totally exhausted. Operating the bed after oxidation
capacity is exhausted will reduce its service life and may cause staining.
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|
ADVANTAGES
-
Iron reduction over
wide pH range
-
Effective reduction
of hydrogen sulfide in addition to iron and/or manganese
-
No harmful effects
from a chlorine feed
-
Low attrition for
long bed life
PHYSICAL PROPERTIES
-
Color: Black
-
Bulk Density: 85 lbs./cu.
ft.
-
Specific Gravity:
2.4-2.9
-
Effective Size: 0.30-0.35
mm
-
Uniform Coefficient:
1.6
-
Mesh Size: 16-60
-
Attrition Loss Per
Year: 2%
CONDITIONS FOR
OPERATION
-
Water pH range:
6.2-8.5
-
Maximum water temperature:
80°F/26.7°C
-
Bed depth: 30 in.
-
Freeboard: 50% of
bed depth (min.)
-
Regeneration: 1.5-2
oz of KMnO4 by weight per cu. ft.
-
Service flow rate:
6 gpm
-
Backwash flow rate:
5 gpm
-
Backwash bed expansion:
40% of bed depth (min.)
-
Maximum practical
limit of iron (Fe++) or manganese (Mn++) in raw water: 15 ppm
-
Maximum practical
limit of hydrogen sulfide (H2S): 5 ppm
Service Flow Rate
Service flow rate
is the maximum gallons per minute recommended for obtaining excellent water
quality. Exceeding the service flow rate will cause a reduction in the product
water quality.
Backwash Flow Rate
Backwash flow rate
is the minimum gallons per minute recommended for proper reclassification
of the media or resin. Insufficient backwash flow rate will cause inadequate
media or resin reclassification and, over time, may reduce its effectiveness.
Calculating Your
Flow Rate
You will need a watch
with a second hand and a 1 or 5 gallon container to measure your flow rate
with the instructions below.
-
Using the bathtub
as the measuring point, open BOTH the hot and cold water faucets completely
(If you have a well water supply, wait until the pump kicks on before
continuing.)
-
Place either a 1 or
5 gallon container under the faucet and measure the amount of time it takes
to fill the container in seconds.
-
Refer to the chart
below. Find the row on the left that contains the size of the container you
used to fill with water, either 1 or 5 gallons.
-
Then, find the column
across the top that is closest to the number of seconds in took to fill the
container.
-
The value in the table
at the intersection of the row and column you determined is your flow rate
in gallons per minute.
| Seconds
to Fill Container |
| Container
Capacity (gal) |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
70 |
75 |
80 |
85 |
90 |
| 1 |
12.00 |
6.00 |
4.00 |
3.00 |
2.40 |
2.00 |
1.71 |
1.50 |
1.33 |
1.20 |
1.09 |
1.00 |
0.92 |
0.86 |
0.80 |
0.75 |
0.71 |
0.67 |
| 5 |
60.00 |
30.00 |
20.00 |
15.00 |
12.00 |
10.00 |
8.57 |
7.50 |
6.67 |
6.00 |
5.45 |
5.00 |
4.62 |
4.29 |
4.00 |
3.75 |
3.53 |
3.33 |
|
CAPACITY PER CU.
FT.
-
Iron alone: 600 grains
(10,000 gal. of water containing 1 ppm iron/cu. ft.)
-
Iron and manganese:
400 grains (7,000 gal. of water containing ½ ppm iron and ½ ppm
manganese/cu. ft.)
-
Hydrogen sulfide:
175 grains (3,000 gal. of water containing 1 ppm hydrogen sulfide/cu.
ft.)
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