Triplex System
For Iron and Manganese removal with a pH correction stage and aeration for media effectiveness in precipitation of contaminants.
Heavy metallic contaminants and some non metallic contaminants can be removed from water using specific media. These media can be mixed in a multi-layer bed which when combined with an appropriate backwash or regeneration system, can be tailored to solve a wide range of specific contaminant problems. Iron. Manganese, Aluminium and Hydrogen Sulphide along with Humic Acid/Tannins can be removed by the catalytic action on the media which uses oxygen with an aeration stage.
Triplex filter media is a special blend of pH correction media, catalytic iron and manganese removal media with or without filer AG which has the effect of raising the pH and filtering out turbidity, iron and manganese. Triplex media is sometimes used for the removal and reduction of hydrogen sulphide. The insoluble precipitate is filtered out on to the surface of the media ready to be backwashed to waste when programmed.
Triplex filter media may be blended with BIRM, pHloctirite ( Calcite) Filter AG, Filox-R, Crystal Right, Aqua Multi among others.
Maximum Iron levels:- Triplex systems can be use on iron levels up to 20 ppm with certain reservations.
Manganese levels:- in a Triplex system is dependent on the level of iron and other contaminants in raw water. The higher the levels of iron the easier the manganese is removed with an Iron/Manganese ratio of 10:1 the Manganese will be reduced well at a pH of 7/7.5. At a ratio of 5:1 a pH above 7.8/8.2 is required and if the Manganese is above the Iron level a pH higher than 8.3 is required. The pH correction media in a Triplex blend require that extra pH correction may be required on top of what is in it as above a pH 8.0 it will become less active.
Hydrogen Sulphide:- Hydrogen Sulphide is removed at concentrations of up to 3 ppm.
Humic acid/Tannins:- Organic matter in raw water may create Humic acid or Tannins seen as a light to dark brown colour in low pH or “peaty” waters. These tannins can combine and complex with iron and sulphur coating and blinding the pH correction and filter media reducing its effectiveness. Tannin levels should be less than 2 ppm to eliminate the need to change the media frequently or rejuvenate. If tannin levels greater it will be necessary to oxidise the tannins to an insoluble flocc to remove by filtering after oxidising by ozone or aeration with a venturi injector to raise the oxygen levels.
Max Iron 20 ppm pH 6.0 / 0.9 Organic Matter less than 5 ppm
Free Cl2 less than 0.5 Chloride below 100 ppm Temperature 3 / 45 deg C
No Oils or Polyphosphate.
Backwash flow rate must be at least the same as the service flow rate and pressure of 3 bar.
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