One stage of reed beds fed with raw sewage assures primary and secondary treatment for 1200 People Equivalent, followed by a trickling filter for polishing and nitrification. A tertiary UV treatment enables a pathogens removal by 4 U log.

Vertical flow wetland, 75 PE for an ecological housing project in Arnhem, the Netherlands.

Hollange : a 432 m², vertical flow reed bed (French system) plus a 288 m² second stage unsaturated vertical flow filter, and a 1200 m² vegetated polishing zone treating 102 m3/d of domestic effluent.

The Orhei Constructed Wetland treatment plant, the biggest secondary treatment entirely based on CWs in the world

Bauduen : a 2-stage Vertical FLow  reed bed filter (French Design) for the treatment of domestic effluent from a village with variable population. A UV tertiary treatment ensures pathogens removal for protection of the bathing area in the lake downstream.

Crynant: Two 1,200m2 vertical flow reed beds operated alternately to treat 3,400 m3/d of tertiary municipal waste water.

Aerated wetland of 360 m², treating the sanitary waste water from an elementary school.

Saint Bonnet le Froid : a 900 m², vertical flow reed bed (French system) plus a 600 m² second stage unsaturated vertical flow red bed for the treatment of  domestic effluent from a village with variable population.

Pouembout : a 250 p.e. reed bed filter was created to replace a deficient waste stabilization pond.

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