Granular loading of MTM
МТМ is a filter media for removing iron, manganese, and hydrogen sulfide from the water.
МТМ is a granular filter media enriched with manganese (II) oxide. Used to remove iron, manganese, and hydrogen sulfide from the water.
The active surface of MTM granules oxidizes and precipitates dissolved iron and manganese. Hydrogen sulfide is oxidized to sulfur. The sediment is retained by a layer of filter media and removed during backwashing.
MTM consists of light granules with manganese (II) oxide deposited on their surface. This coating provides contact filtration, where the medium itself has an oxidizing potential. This allows you to expand the scope of application of the filter media compared to other media for removing iron. It can be used at pH 6.2 and above. Oxygen dissolved in water is not a prerequisite for performance.
MTM is lightweight and therefore requires less backwash water flows. When the oxidizing potential of the MTM decreases, it should be regenerated with a potassium permanganate solution to restore the oxidizing ability.
For normal regeneration, it is sufficient to use a solution prepared at the rate of 1.5-2 grams (dry weight) per liter of MTM. Before regeneration, the MTM should be back washed with a stream that will not wash light pellets into the drain.
Before putting the filters with MTM into operation, backwash should be carried out (excluding the possibility of carryover of light granules into the drainage), and be sure to regenerate it.
MTM is used with a batch or continuous regeneration scheme to restore oxidation capacity.
Restoration of the oxidizing capacity of the feed is carried out with a solution of potassium permanganate or sequential treatment with solutions of chlorine and potassium permanganate. At the same time, manganese (II) oxide on the surface of the granules acts as an oxidation catalyst, as well as a buffer to prevent the ingress of potassium permanganate into the consumer’s water main.
ADVANTAGES
Significant iron removal range.
Effective removal of hydrogen sulfide, iron, and manganese.
Low-pressure drop in the loading bed.
Low water flow during backwash due to the lightweight of the pellets.
High dirt holding capacity/
Acceleration of filtration in the presence of chlorine.
Low abrasion.
Lightweight for transportation.
PHYSICAL PROPERTIES
Color: dark brown
Density: 0.43 g / cm3
Specific gravity: 1.7 g / cm3
Size: 1.68 – 0.5mm
Uniformity Coefficient: 1.9
RESOURCE
Iron
10,000 l of water with an iron concentration of 1 mg/l.
Manganese
5000 l of water with a concentration of manganese 1 mg/l.
Hydrogen sulfide
3000 l of water with a concentration of hydrogen sulfide 1 mg/l.
CONDITIONS OF APPLICATION
The pH of water: 6.2 – 8.8 (at pH less than 6.8 – at% chlorine dosage).
No oil, no polyphosphates.
Maximum water temperature: 38 ° C.
Layer height: 61-91.4 cm (24-36 inches).
Water flow rate:
in service mode: 7.2 – 12 m / h (3-5 gpm / ft2);
in postcircuit in backwash mode: 19.2-24 m / h (8-10 gallon / min / ft2).
Layer expansion: 20 – 40%.
Reagent: potassium permanganate.
Regenerant dose: 1.5-2 grams per liter of MTM.