CAYENNE Jardin du college Wastewater Treatment Plant, Cayenne, French Guiana

CAYENNE Jardin du college is a municipal wastewater treatment plant located in Cayenne, French Guiana, at Rue Arthur Ashe. It serves a small population of 500 people, reflecting its role in a local community within the urban area of Cayenne. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 500 m³/day and a discharge volume of 89.20 m³/day, it operates well within its capacity. As a French facility in an overseas department, it falls under French and EU environmental regulations, including the Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean. Being within 10 km of the coast, the plant's discharge has potential implications for coastal water quality and marine ecosystems. The surrounding area includes the Cayenne River estuary and nearby mangrove habitats, which are ecologically sensitive zones supporting diverse aquatic life.

The plant discharges into the Cayenne area watershed, which flows into the Atlantic Ocean via the Cayenne River estuary. This coastal region features mangrove forests and estuarine habitats that serve as nurseries for fish and crustaceans. The proximity to the coast means that treated wastewater can influence nearshore water quality, particularly in the context of nutrient loading and potential eutrophication. The local environment supports a variety of marine and brackish-water species, making careful management of discharges important for ecological balance.