ETE SAO RAFAEL - Secondary Wastewater Treatment Plant in São Rafael, Rio Grande do Norte, Brazil

ETE SAO RAFAEL is a municipal wastewater treatment plant located in São Rafael, a city in the state of Rio Grande do Norte, Brazil. The plant serves a population of around 5,702 residents, classifying it as a small-scale facility within the region's sanitation infrastructure. It operates under Brazil's national environmental regulations, which set standards for effluent quality and water resource protection. The plant provides secondary treatment, a standard level that typically involves biological processes to reduce organic matter and suspended solids. Secondary treatment is appropriate for communities of this size and aligns with common practices in Brazilian wastewater management. The plant discharges an average of 403.25 cubic meters of treated wastewater per day, contributing to local water quality management. The treated effluent from ETE SAO RAFAEL is released into local water bodies that drain into the Piranhas-Açu River basin, which flows through the semi-arid sertão region of northeastern Brazil. This river system is vital for agriculture, livestock, and human consumption in the area. Proper treatment helps protect downstream ecosystems and supports the sustainability of water resources in a region prone to drought.

The plant's discharge enters local streams that feed into the Piranhas-Açu River basin, a major watercourse in northeastern Brazil that ultimately reaches the Atlantic Ocean near the city of Macau. The region's semi-arid climate makes water quality crucial for both human use and aquatic life. The river supports diverse fish species and provides habitat for migratory birds, while its estuary is ecologically sensitive. Effective wastewater treatment is essential to prevent nutrient loading and maintain the health of this downstream environment.