MTM Media 1/2 Cu Ft. (27 lbs) Box
Media: MTM, Replaces Greensand, 1/2 Cu Ft. (27 lbs) Box. Clack MTM is a granular manganese dioxide filtering mediaused for reducing iron, manganese and hydrogen sulfidefrom water. Its active surface coating oxidizes and precipi-tates soluble iron and manganese. Hydrogen sulfide is oxidized to a sulfur. The precipitates are filtered out in the granu-lar bed and removed by backwashing.MTM consists of a lightweight granular core with a coating ofmanganese dioxide. The coating provides an example of con-tact filtration where the media itself provides the oxidizingpotential. This allows for a much broader range of operationthan many other iron removal media. A pH level as low as 6.2can be treated. Dissolved oxygen is not essential. The medias lightweight reduces backwash water requirements.
When the oxidizing power of MTM is reduced, the bed has tobe regenerated with a weak solution of potassium perman-ganate (KmnO4), thus restoring its oxidizing capacity. Aregenerating solution of 1-1/2 to 2 ounces (dry weight) ofpotassium permanganate per cubic foot is sufficient for nor-mal regeneration. Upon start-up a new bed should be back-washed and caution taken to insure that the light weight media is not backwashed to drain. A new bed should be regenerated the evening of installation. Operating the filterafter its oxidizing capacity is exhausted will reduce its service life and may cause staining. MTM requires either intermittent or continuous regenerationto 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 Line.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. Conditions for Operation: Water pH range: 6.2 8.5 Maximum water temp: 100F/38C Bed Depth: 24-36 in. 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 KMnO4by 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.
Manufacturer: Clack Corporation
Manufacturer #: MTM-50-BOX