ECO-SEWAGE TREATMENT PLANT IN BOIS-LE-ROI, CHARTRETTES (77)

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Contracting authority : City's of Bois-le-Roi – Chartrettes – Fontaine-le-Port
Mission : eco-building, HQE architecture and landscaping
Contractors : OTV France Nord – Phytorestore
Treatment capacities : 10 000 EH
Works outlay : about 2 100 k€ (exclusive of tax)
Location : Chartrettes (77)
Market concluded in June 2006
Works started in March 2007
Works ended in August 2008

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Bois-le-Roi wastewater treatment plant design is focused on the limitation of the impact of this kind of building on the natural park of Livry. The landscaping integration is the key idea of the project and it is achieved threw the architecture of the building, a green landscaping with rural vegetables and aquatic areas.

This site is rich in fauna and flora which contributes to maintain the quality of the natural space. The site is open to the public who can see the wastewater treatment ponds from a roof terrace and have a walk near to the aquatic areas, where the water passes before being rejected.

Eco-building targets :

 

Target 1 : Harmonious relationship between the building and its environment. Perfect visual integration of the building, wood outfitting of the facade, an ecological material which enables a better landscaping integration than the usually used concrete. The visual impact of the treatment ponds is limited by merlons.

Eco-management targets :

 

Target 5 : Optimized water control. Heavy public roads run-off water control by a green ditch which receives the rainwater. Selected vegetables in the ditch enable the degradation of a part of the pollutants (hydrocarbons, grease...) before the infiltration of the water into the soil. Planted ponds for the final transit of treated water improve its biological quality before it's rejected in a natural milieu.

Comfort targets :

 

Target 10 : Optimized visual comfort. Rural hedges give rhythm to the landscape, they are linked with the pedestrian path. A channel relays the run of water from the plant to the Seine.

Creation of real damp area ecosystems, setting up of local vegetation and nest boxes in order to favor biodiversity on the site.

Target 11 : Optimized olfactory control. Fouled air coming out of the treatments is deodorized by a coal filter at the rate of 67 200 m3/day.

Target 9 : optimized acoustic comfort. Noise pollution made by the treatment equipments is sealed by materials which absorb the sounds (wood, green roof). Noise level lower than 30dB (the highest level of transmitted noise).