ETE Parque Sueli - Secondary Wastewater Treatment in São Bento do Sul, Santa Catarina

ETE Parque Sueli is a wastewater treatment plant located in the Alpino neighborhood of São Bento do Sul, Santa Catarina, Brazil. It serves a small population of 289 people, reflecting its role in a residential area of this inland municipality. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. Under Brazilian regulations (CONAMA resolutions and state environmental laws), secondary treatment is typically required for communities of this size to protect water quality in receiving bodies. The treated effluent is discharged into local watercourses that drain into the Rio Negro basin, eventually reaching the Atlantic Ocean via the Baía de Babitonga or nearby coastal systems. The plant helps safeguard the water quality of streams in the Upper Rio Negro region, which supports diverse aquatic life and provides water for downstream communities.

The plant discharges into small streams that flow into the Rio Negro, a major river in southern Brazil. The Rio Negro basin drains into the Baía de Babitonga, an important estuarine ecosystem that supports mangroves, fish nurseries, and migratory birds. Protecting water quality in this watershed is critical for maintaining the ecological health of the estuary and the Atlantic coastal zone.