ETE VALE DO SOL II - Secondary Wastewater Treatment Plant in Piracicaba, São Paulo

ETE VALE DO SOL II is a wastewater treatment plant located in the Vale do Sol neighborhood of Piracicaba, in the state of São Paulo, Brazil. It serves a small population of 157 residents, reflecting its role as a local facility for a residential community. The plant is situated in the southeastern region of Brazil, an area characterized by a subtropical climate and significant agricultural and industrial activity. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. In Brazil, wastewater treatment is regulated by federal and state environmental agencies, with CONAMA resolutions setting discharge standards. For small plants like this, secondary treatment is typically sufficient to meet effluent quality requirements. The plant operates with a discharge volume of 35.00 m³/day, indicating a consistent flow from the served population. The treated effluent is discharged into local water bodies that eventually flow into the Piracicaba River, a key tributary of the Tietê River, which drains into the Paraná River basin. This river system supports diverse aquatic life and is vital for regional water supply, agriculture, and recreation. By treating wastewater, ETE VALE DO SOL II helps reduce nutrient and pathogen loads, protecting downstream ecosystems and public health.

The plant discharges into the Piracicaba River watershed, which flows into the Tietê River and ultimately the Paraná River basin, one of South America's largest river systems. This region supports diverse aquatic habitats and is important for migratory fish species. The secondary treatment process reduces organic pollution, helping to maintain water quality in a basin affected by urban and agricultural runoff.