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Polonite Nordic AB
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  5. Reactive Filter Media Polonite

Reactive Filter Media Polonite

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Polonite® is a filter media with a high and proven ability to capture phosphorus. It is based upon a natural mineral, Opoka, that has historically been used for e.g. for building houses. Polonite® is a filter media with a high and proven ability to capture phosphorus. It is based upon a natural mineral, Opoka, that has historically been used for e.g. for building houses. Nothing is added, and nothing is removed, from the Opoka. But the Opoka is heated, crushed and sieved to be transformed to Polonite®. The result is a media with excellent capabilities of capturing phosphorus from both sewage water, and e.g. runoff water from farmlands. Capturing phosphorus is essential, but equally essential is that Polonite® also fulfils the important function of recycling this vital, but scarce, nutrient by recycling it to productive farmlands.

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Capturing phosphorus is essential, but equally essential is that Polonite® also fulfils the important function of recycling this vital, but scarce, nutrient by recycling it to productive farmlands. As an example, Polonite® achieves a phosphorus reduction of close to 100% in sewage water with new Polonite® media and at least 90% if employed for a longer period* of time. The function is proven by over 20 years of research at The Royal Institute of Technology in Stockholm (KTH) and through over 8000 installed filter solutions.

Owing to its large surface area in combination with a high pH, Polonite also possesses excellent bacterial reduction abilities. 500 kg of Polonite® is comparable to 40 tons of regular sand in terms of surface area. Polonite® also has biofilm and is high in pH, which reduces bacterial count. Tests have shown an initial elimination of 99,9% of E-coli and coliforms. Additionally, the high pH in the treated outgoing water prevents acidification of the surrounding environment.

After a brief period of drying in the air, saturated Polonite® can be used as an excellent fertilizer without further after-treatment. The captured phosphorus is slowly released – at the same pace plants absorb phosphorus (compared to the chemical flocculants). Furthermore, the filters also contain calcium and silicon, which are important nutrients for soil and plants.

Saturated Polonite® from treatment plants does not contain any quicksilver, cadmium, and minimum bacteria and can be distributed directly on farmlands easily with traditional tools and spreaders. The dosage depends on the conditions of the soil.

The phosphorus reduction depends mainly on the cumulative water flow, but also the phosphorus concentration in the water. A Polonite® filter is normally constructed to uphold a high reduction during a period of 2-4 years. The reduction pace decreases slowly during the filter’s life cycle.

A natural occurring mineral treated to enhance its capabilities.

  • Used mainly for phosphorus reduction in wastewater treatment plants and facilities.
  • Saturated Polonite® can be distributed in the soil without any after-treatment and recycles phosphorus by returning it to plants.
  • Strong capability to reduce bacteria and odour.
  • Phosphorus reduction in both small and large wastewater treatment plants
  • Phosphorus reduction in runoff water from farmland and industries
  • Fertilizer and calcium source for productive soil.