- Main leader : Syndicat de traitement des eaux usées Saône-Beaujolais
- Type of initiative : Initiative involving different people (collective, etc.)
- Belleville (Rhône)
- Rue de la Serve de Vigne - 69220 Belleville
- Start date : janvier 2013
The CITEAU building has been eco-designed to save energy. It is equipped with a green roof that improves insulation, biodiversity and landscape integration. Its lighting is mostly natural via skylights, and it is heated by recovering the waste energy contained in the effluents.
In 2012 a feasibility study confirmed the possibility of extending this heat recovery system and allowing a nearby property programme to benefit from it.
Since 2014, the station has been supplying the first phase of a 9,000 m² LCB (Low Consumption Building) project called "La Villa Durabo", or 88 housing units, offices and shops. To do this, heat sales contracts have been drawn up between the owners and the wastewater treatment syndicate. This system is now being expanded.
In addition, sewage from the plant is used for agricultural composting and the sands are washed to be reused.
The one-hectare plot of land surrounding the treatment plant has been converted into a biodiversity zone, with an organic orchard, ponds, a meadow, nesting boxes and insect hotels. Maintenance is carried out without using any fossil energy by two ponies and a flock of barnacle geese. The land is watered using purified water.
- A reproducible, innovative project: This facility, the first of its kind in France, is replicable in all wastewater treatment plants and in 2013 it received a "Marianne d'Or de la République" award for being innovative, exemplary and reproducible.
- Synergies with the surrounding area.
- Educational: The plant opens its doors, especially to schools, to show them how its different functions - sanitation, energy production and biodiversity reserve - operate. It displays the water cycle as a virtuous circle.
- Showcasing the treatment plant
- Taking biodiversity into account Creation of a biodiversity zone to compensate for the urbanization and artificialization caused by the construction of the facility.
- Contribution to the energy transition by replacing fossil fuels with renewable energies and with low energy buildings
Heat recovery provides up to 80% to the energy needs of the "Villa Durabo" housing, offices and shops (heating, cooling and domestic hot water).
- The carbon analysis of the housing complex has been divided by 3
- 73 tonnes of CO2 avoided per year
- Lasting savings for users
Stages of the initiative
2011: CITEAU commissioned
2012: feasibility study on the possibility of creating a heat network for the property programme
2014: The first buildings are heated by CITEAU
- A strong political will of the elected representatives
- The disadvantages due to the location of CITEAU near the town centre helped to make it an ambitious and exemplary project
- The ability to find financing
Convince partners (stakeholders of the property programme: developer, builder, buyers, etc.), and financiers (the water board, ADEME, the Auvergne-Rhône-Alpes Region and the Rhône Department).
Areas of activity
- Renewable energies
- Energy efficiency
- Unavoidable and recovered energy
- Heating networks
- Various technical facilities are used for heat recovery
- Low energy buildings
- Biodiversity area around CITEAU: ponds, orchard, meadow, insect hotels, nesting boxes, etc.
Devices, tools or methodologies
- Feasibility study
- The syndicate changes status to become an energy producer and seller
- Legal work to draw up heat sales contracts
- Communication and awareness campaigns
- Expansion of the heating network
- The aim is to instil the same values into other projects of the inter-communal authority area.