In operation since 1976, the Marne Aval (downstream) SIAAP water treatment plant in Noisy-le-Grand was entirely modernised in 2009. This wastewater treatment plant is compact, modern and highly advanced technologically. It features the most stringent techniques for high environmental quality in the construction sector. So, this modernisation doubles the wastewater treatment capacity of the Marne Aval plant and reduces the space required.
The Marne Aval wastewater treatment plant is part of an overall sanitation plan for the Parisian suburbs that dates back to 1968. Opened in 1979, its purpose at the time was to treat wastewater for a population equivalent of 112,000 inhabitants. In the beginning, it was an active sludge wastewater treatment plant. A nitrogen fixation unit was then added.
Faced with new regulations and the obsolescence of the facility, the SIAAP commissioned us to completely rebuild the plant.
The Marne Aval plant modernisation took place in response to the wastewater management policy of the Paris suburbs. This project was part of the key sanitation plan for Greater Paris and had three goals: improve wastewater treatment performance; increase the capacity of the Marne Aval plant; and enhance the quality of life of local residents.
Its water decontamination process consists of pre-treatment, physical and chemical sedimentation and biological purification (carbon and nitrogen pollution), followed by tertiary sedimentation (phosphate pollution). Biofiltration is used to biodegrade carbon and nitrogen. Finally, before evacuation into the Marne, the treated water is disinfected with ultraviolet lamps.
The thermal processing of wastewater sludge was selected as a solution for energy recovery. This was the best choice for the plant’s urban context. Energy recovery by the thermal processing of sludge minimises odours and noise. Also, the small volume of residue minimises disposal transport and therefore greenhouse gas emissions.
(The lead contractor was OTV; the Wastewater Treatment Division of VINCI Construction France was responsible for pre-treatment, sludge dewatering and odour removal)
The Marne Aval plant modernisation took place in response to a new wastewater management policy in the Paris suburbs: process sewage as close to its production site to better distribute the flow to various treatment plants. The SIAAP opted for a compact plant on the Marne that is architecturally integrated with the urban context.
After this modernisation, the treatment capacity increased from 30,000 m3/day to 75,000 m3/day to handle sewage from 16 communes for a population of 300,000.
Rebuilt because it had become obsolete, the Marne Aval wastewater treatment plant in Noisy-le-Grand today has compact and covered equipment and cutting-edge technology.
Its new wastewater treatment performance and surrounding green spaces make this plant a fitting answer to the Marne’s ecological and environmental challenges while respecting local residents’ quality of life.
With its new equipment, the Marne Aval plant today treats 2.5 times more wastewater in half the surface area. In addition, this new plant releases fewer pollutants, including 4 times fewer particles, half the amount of carbon, and 2.5 times fewer nitrogen and phosphate compounds.
Client
SIAAP Noisy le Grand Seine St Denis France
Commissioning date
2009
Traitment capacity
75 000 m3/jour
Coverage
16 Seine-Saint-Denis and Seine-et-Marne communes
