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Manganese Greensand is capable of reducing iron,
manganese and hydrogen sulfide from water through oxidation
and filtration.
Manganese Greensand
Manganese Greensand is formulated from a glauconite greensand 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 greensand 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 Manganese Greensand bed is exhausted, the bed has
to be regenerated with a weak potassium permanganate (KMnO4)
solution thus restoring the oxdizing capacity of the bed. 1½ to 2 ounces of potassium
permanganate, in solution, per cubic foot of Manganese Greensand is
considered sufficient for normal regneration. 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.
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: 3-5 gpm/sq. ft., 8-10 gpm/sq. ft. intermittent flow possible
Backwash flow rate: 10-12 gpm/sq. ft.
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
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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Tested and listed under ANSI/NSF
Standard 61 for Health Effects. |
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The information and recommendations in this publication are based on data
we believe to be reliable. They are offered in good faith, but do not imply any warranty
or performance guarantee, as conditions
and methods of use of our products are beyond our control. As such, Clack makes no express
or implied warranties of any kind with respect to this product, including but not limited
to any implied
warranty of merchantability or fitness for a particular purpose. We recommend that the
user determine whether the products and the information given are appropriate, and the
suitability and performance of our products are appropriate, by testing with its own
equipment.
The information and recommendations given in this publication should not be understood as
recommending the use of our products in violation of any patent or as a license to use any
patents of the Clack Corporation.
The filter medias listed in this brochure do not remove or kill bacteria. Do not use with
water that is microbiologically unsafe or of unknown quality without adequate disinfection
before or after the
system.
Clack will not be liable under any circumstance for consequential or incidental damages,
including but not limited to, lost profits resulting from the use of our products.
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R&M Manufacturing,
Inc.
