ETE ARBORIS Wastewater Treatment Plant, Lauro de Freitas, Bahia, Brazil

ETE ARBORIS is a wastewater treatment plant located in the Portão neighborhood of Lauro de Freitas, Bahia, Brazil. The plant serves a population of approximately 6,284 people and is situated in the Metropolitan Region of Salvador, a densely populated coastal area in the Northeast region of the country. The plant provides secondary treatment, which is the standard biological treatment required under Brazilian regulations (CONAMA resolutions) for municipal wastewater. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant discharges a daily volume of 72.23 units of treated effluent. The treated effluent from ETE ARBORIS is discharged into the local watershed, which ultimately drains into the Atlantic Ocean. The plant's proximity to the coast (within 10 km) means its discharge can affect coastal water quality and marine ecosystems. The region's tropical climate and urban development make proper wastewater treatment essential for protecting recreational waters and mangrove habitats along the Bahia coast.

ETE ARBORIS discharges treated wastewater into the coastal watershed of the Salvador metropolitan area, which flows into the Atlantic Ocean. The plant's location near the coast means its effluent can influence nearshore water quality, affecting marine life and recreational beaches. The region supports diverse aquatic ecosystems, including mangroves and estuaries that serve as nurseries for fish and crustaceans. Proper treatment is critical to prevent nutrient enrichment and pathogen contamination in these sensitive coastal waters.