Dual porosity filtration

Dual Porosity Filtration is a water treatment technology simultaneously targeting fine particles and dissolved contaminants.

Dual Porosity Filtration (DPF) is developed for storm water treatment to protect the environment and for use of treated water in both the urban landscape and as secondary water supply in households and industry.       The basic principle is to let water flow in a layer with high porosity, and accumulate the unwanted substances in a layer below with low porosity. The flow is driven by gravity, and there is no addition of chemicals.

Pilot plant test  

The DPF-technology has been tested in a pilot plant receiving storm water runoff from 1.3 reduced hectares of trafficked areas. The pilot plant is located belowground in a park in Orestad, which is a new high-rise Copenhagen development. In the pilot plant two versions of the filter are tested, retaining 92 % and 99 % of suspended particles in storm water road runoff, respectively.

Full-scale demonstration

The next step is to build a full-scale DPF demonstration plant in Orestad with treatment of road runoff from 30 reduced hectares for use in channels and lakes. The technique is IPR protected by the University of Copenhagen. 

Dual Porosity Filtration

A short animation film that tells the story of Dual Porosity Filtration - an innovative new green technology.