ETE Canivete Wastewater Treatment Plant, Linhares, Espírito Santo, Brazil

ETE Canivete is a municipal wastewater treatment facility located in the Canivete district of Linhares, in the state of Espírito Santo, Brazil. The plant serves a population of approximately 4,382 residents, reflecting its role in managing domestic wastewater for a small community within the broader Linhares urban area. The plant provides secondary treatment, which is the standard biological process for reducing organic matter and suspended solids. Under Brazil's national environmental regulations (CONAMA resolutions and state-level licensing), secondary treatment is typically required for communities of this size to protect water quality. The plant treats an average daily flow of 563.40 cubic meters, indicating a consistent operational scale. The treated effluent is discharged into a local watercourse that ultimately drains into the Doce River basin, one of the most significant river systems in southeastern Brazil. The Doce River flows eastward to the Atlantic Ocean, passing through ecologically important areas such as the Rio Doce State Park. The plant's operation helps reduce nutrient and organic pollution loads, supporting downstream aquatic ecosystems and water quality for communities along the river.

The plant discharges into a tributary of the Doce River, which flows approximately 853 kilometers to the Atlantic Ocean near the city of Regência. The Doce River basin supports diverse aquatic life, including migratory fish species, and its estuary is an important nursery habitat. The region's tropical climate with seasonal rainfall influences runoff and dilution capacity, making consistent treatment essential for maintaining ecological balance in the lower river and coastal zone.