ETE Rio Negrinho - Secondary Wastewater Treatment Plant in Rio Negrinho, Santa Catarina

ETE Rio Negrinho is a wastewater treatment plant located in Rio Negrinho, Santa Catarina, Brazil. It serves a population of approximately 11,266 residents in the Vista Alegre neighborhood. The plant is part of the municipal wastewater infrastructure for the city. The plant provides secondary treatment, which is the standard biological treatment required for urban wastewater in Brazil under CONAMA regulations. With a daily discharge volume of 864 cubic meters, the plant operates at a scale typical for a small to medium agglomeration. Brazilian environmental legislation mandates secondary treatment for all urban wastewater to reduce organic load and protect water quality. The treated effluent is discharged into local water bodies within the Rio Negrinho watershed, which ultimately drains into the Atlantic Ocean via the Paraná and Iguaçu river systems. The region's aquatic ecosystems benefit from the plant's treatment, as secondary treatment significantly reduces pollutants that could otherwise harm downstream habitats.

The plant discharges into the Rio Negrinho watershed, part of the Paraná River basin, which flows into the Río de la Plata estuary and the Atlantic Ocean. The downstream environment supports diverse aquatic life, including fish species important for local fisheries. Secondary treatment helps protect these ecosystems from excessive organic pollution and nutrient loading.