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Filtralite® used in Europe’s largest underground water works
Europe’s largest underground water works with a production capacity of 390.000 m3/day is newly opened in Oslo, the capital of Norway. The raw water comes from the lake Maridalsvannet and the water treatment process includes:
- pH adjustment
- ActiFlo rapid sedimentation process with addition of coagulant, polymer and micro sand
- Dual media filters
- UV disinfection
- Corrosion control by addition of lime
The plant has a total of 14 dual media filters, all with a 1.5 m deep top layer of Filtralite® and a 0.5 m deep bottom layer of sand. The design filtration velocity is 20 m/h, which is considerably higher than for traditional drinking water treatment plants. Due to the efficiency of the total process and the properties of the Filtralite® material, the run time of the filters is very long and the outgoing water quality exceeds the requirements.
For delivery security reasons the plant consists of two identical yet mutually independent plants that can operate separately.
The water works will supply water to 90% of the population of Oslo and is located 15 minutes outside the downtown area.
Please contact us for further information about Filtralite® in drinking water applications.
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