• Media Based Filtration Systems

    Media Based Filtration Systems

    Removing iron, sediment, chlorine and adjusting pH from your water

Media Based Filtration Systems

Media Based Filtration Systems

Activated Carbon Filters – This is specialised filter media used mainly for dechlorination or removal of organic compounds and colour in water and other contaminants at low levels. The main benefits of carbon filtration are the elimination of tastes and odours. It is sometimes used in the post- polishing process.

pH Correction – This is for neutralising acid water and remineralising very pure water.

Iron & Manganese Removal – Iron and manganese can be removed with a catalytic filter media which used oxygen in the water to convert the metal ions from the soluble to an insoluble form. The insoluble precipitate is then filtered out onto the surface of the media.

Turbidity Filtration – General turbidity removal at high flows can be achieved satisfactorily down to low micron levels using a multimedia filter with a layered bed of gravel, filter sand, garnet and anthracite or filter AG media.

Triplex & Venturi Systems – for iron and manganese removal. This is a popular contaminant removal unit for many tricky waters. This uses a high-performance aerator/separator upstream of the filter bed and valve to increase the oxygen level but reduce the total level of other dissolved gases. The triplex filter media is a special blend of pH correction media, catalytic iron removal media and filter AG which has the combined effect of raising the pH and filtering out turbidity, iron and manganese. Triplex media is sometimes used for the removal of hydrogen sulphide. Unlike other systems, the Triplex system has the same service flow as backwash flow which reduced the need for higher output and make the triples ideal for domestic and light commercial applications.

Organic Scavengers

Organic Scavenger are used primarily in 2 applications – colour removal or organics removal often as protection for demineralizers to reduce fouling.

Colour Removal – These colour causing substances are naturally occurring organic matter, primarily tannic and humic acids. If the colour is due to organics then treatment is normally by ion exchange or activated carbon. Organics are generally found in certain parts of the country that have a heavy peat content for example in Scotland. Organic colour comes from decaying vegetation and may be completely soluble or particulate. Tannins (Humic and Fulmic acids) are by far the most common class of compounds and give the water a yellow/brown tint. In highland areas where water runs off peat the water can be virtually brown.

Nitrate Removal Systems – A Nitrate Removal system works in the same way as a softener does in terms of ion exchange, except it uses a different resin which removes nitrates and organics and replaces it with Chlorides. It uses its brine solution to regen the chlorides in the resin rather than sodium like in a softener as the sodium goes down the drain in a nitrate removal system.