CAYENNE EX RFO Wastewater Treatment Plant, Cayenne, French Guiana

CAYENNE EX RFO is a wastewater treatment facility located in Cayenne, the capital of French Guiana, an overseas department of France. The plant serves a small population of 240 people, reflecting its role in a localized community within the urban area of Cayenne. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC). This level of treatment is typically mandated for sensitive areas or where higher effluent quality is needed to protect receiving waters. The designed capacity of 240 cubic meters per day matches the population served, indicating a facility sized for its current load. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean. Cayenne is located on the coast of French Guiana, and the plant's proximity to the coast means its discharge can influence coastal water quality. Advanced treatment helps minimize nutrient and pollutant loads, protecting the marine environment and supporting biodiversity in the region's estuaries and mangroves.

The plant discharges into the coastal waters of French Guiana, which are part of the Atlantic Ocean basin. The region's watershed includes the Cayenne River and surrounding creeks that flow into the Atlantic. The coastal zone supports diverse aquatic life, including mangrove ecosystems that serve as nurseries for fish and crustaceans. Advanced treatment at this plant helps reduce the risk of eutrophication and protects these sensitive habitats from excessive nutrient inputs.