2023 Online Catalog - Flipbook - Page 136
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Clack MTM
MTM®
®
Clack MTM is a granular manganese dioxide filtering media used
for reducing iron, manganese and hydrogen sulfide from water.
Its active surface coating oxidizes and precipitates soluble iron
and manganese. Hydrogen sulfide is oxidized to a sulfur. The
precipitates are filtered out in the granular bed and removed by
back-washing.
Resins, Media & Chemicals
18
MTM® consists of a lightweight granular core with a coating of
manganese dioxide. The coating provides an example of contact
filtration where the media itself provides the oxidizing potential.
This allows for a much broader range of operation than many
other iron removal media. A pH level as low as 6.2 can be treated.
Dissolved oxygen is not essential. The media’s lightweight
reduces backwash water requirements.
When the oxidizing power of MTM® is reduced, the bed has to
be regenerated with a weak solution of potassium permanganate
(KmnO4), thus restoring its oxidizing capacity. A regenerating
solution of 1-1/2 to 2 ounces (dry weight) of potassium
permanganate per cubic foot is sufficient for normal regeneration.
Upon start-up a new bed should be back-washed and caution
taken to insure that the lightweight media is not back-washed
to drain. A new bed should be regenerated the evening of
installation. Operating the filter after its oxidizing capacity is
exhausted will reduce its service life and may cause staining.
MTM® requires either intermittent or continuous regeneration
to maintain its oxidizing capacity. A solution of potassium
permanganate (or chlorine then potassium permanganate) can be
pre-fed to maintain capacity. In the latter case, the manganese
dioxide coating acts as a catalyst to enhance the oxidation
reaction and as a buffer to reduce any excess potassium
permanganate concentration and prevent it from entering the
service lines.
Capacity Per Cu. Ft.:
• Iron (Fe+2) alone 600 grains (10,000 ppm)
• Manganese (Mn+2) alone 300 grains (5,000 ppm)
• Hydrogen Sulfide (H2S) alone 175 grains (3,000 ppm)
Advantages:
• Broad operating range for iron reduction
• Lower pressure loss through the bed with high-flock holding
capacity
• Effective hydrogen sulfide, iron and manganese reduction
• Lightweight requires lower backwash rates and reduces
pumping requirements.
• Chlorine can be beneficial in extending filter run times
• Low attrition loss for long bed life
• Lower shipping cost
Conditions for Operation:
Water pH range ................................................................................................6.2 – 8.5
Maximum water temp ........................................................................ 100°F/38°C
Freeboard ........................................................................ 50% of bed depth (min.)
Service flow rate..........................3 – 5 gpm/sq.ft., 8 – 10 gpm/sq.ft.
intermittent flow possible.
Backwash flow rate....................................................8 – 10 gpm per sq. ft.
Backwash expansion rate ................ 20 – 40% of bed depth (min.)
Regenerate dosage..........................................1-1/2 to 2 oz of KMnO4 by
weight per cu. ft.
Physical Properties:
Color ...................................................................................................................... Dark brown
Bulk Density ............................................................................................. 45 lbs./cu. ft.
Specific Gravity ..............................................................................................2.0 gm/cc
Effective Size .......................................................................................................0.43 mm
Uniformity Coefficient ................................................................................................ 2.0
Mesh Size .................................................................................................................. 14 x 40
MTM® is a federally registered trademark of Clack Corporation.
Certified to
NSF/ANSI 61
Clack MTM®
An alternative media to Manganese Greensand for the removal of iron, manganese and hydrogen
sulfide with a weight of 27 lbs. per cubic foot. Must be regenerated with potassium permanganate.
Pallet quantity - 40 bags per pallet
$
MTM
1 Cubic Foot Bag
144.00
$
MTM-50-BOX
1/2 Cubic Foot Box
96.50
$
MTM-75-BOX
3/4 Cubic Foot Box
134.00
$
MTM-100-BOX
1 Cubic Foot Box
172.00
For more information visit – NelsenCorp.com
• Commercial.NelsenCorp.com •
All prices and products subject to change without notice. ©Nelsen Corporation
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