Overview
ATTICHY wastewater treatment plant in Couloisy, Hauts-de-France, France, serves 2,240 people with advanced treatment and a designed capacity of 4,000 m³/day.
ATTICHY is a wastewater treatment plant located in Couloisy, within the Compiègne area of Oise, Hauts-de-France, France. It serves a population of 2,240 and is designed to handle a capacity of 4,000 m³/day, with an average discharge volume of 399.61 m³/day. The plant employs advanced treatment processes, exceeding the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. This level of treatment is typically mandated for sensitive areas or to meet stringent effluent quality standards. The treated effluent is discharged into the local watershed, which ultimately drains into the Oise River, a major tributary of the Seine. The Seine basin supports diverse aquatic life and is an important ecological corridor in northern France, with the Seine River flowing into the English Channel.
Environmental context
The plant's discharge enters the Oise River basin, which flows into the Seine River and eventually reaches the English Channel. The Seine estuary and downstream marine environment support a variety of fish species and migratory birds. Advanced treatment helps protect water quality in this ecologically sensitive river system, which is used for drinking water abstraction and recreation.
Frequently asked questions
ATTICHY is located in Couloisy, in the Oise department of Hauts-de-France, France, near Compiègne.
The plant serves a population of 2,240 people.
The treated effluent is discharged into the local watershed, which flows into the Oise River, a tributary of the Seine River, and ultimately reaches the English Channel.
As a French plant serving over 2,000 people, ATTICHY operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum. The plant's advanced treatment exceeds this standard, indicating operation in a sensitive area or under stricter national requirements.
In France, plants serving agglomerations of this size typically provide secondary biological treatment, often with nutrient removal. Advanced treatment, as used at ATTICHY, may be required for discharge into sensitive water bodies or for reuse purposes.
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