In operation since: 2011
Type of wastewater treated: Domestic
Hydraulic load: 102 m3/d
Organic load (PE): 250 PE
Organic design load (kg BOD/day): 14
Location: Hollange, Belgium
Client: Société publique de gestion de l’eau (S.P.G.E.) (Belgique)
Stage 1 type: Vertical flow reed bed system (French system)
Stage 1 surface area (m²): 432
Stage 2 type: Vertical flow, unsaturated
Stage 2 surface area (m²): 288 m²
Stage 3 type: Vegetated polishing zone
Stage 3 surface area (m²): 1200 m²
Cost: 455,000.00 €
Designed by SINBIO
The project was to create a reed bed filter (2 stages and a vegetated polishing zone) to protect a very sensitive environment (NATURA 2000 - The Pearl mussel).
Two stage reed bed filters, fed by pumping (first stage) and gravity flow siphon (second stage). There is no primary treatment; the raw, only coarse screened sewage is fed directly on the first stage beds. A stromwater overflow has been created upstream of the pumping station towards the Vegetated Polishing Zone to minimize rainwater impact to the environment.
This solution allows for a high quality treatment of water, in compliance with European legislation and allows a good protection of The Pearl Mussel in this NATURA 2000 area.