ETE Ribeirao Vermelho Conselheiro Mairinck - Secondary Wastewater Treatment Plant in Paraná, Brazil

ETE Ribeirao Vermelho Conselheiro Mairinck is a wastewater treatment plant located in Conselheiro Mairinck, a municipality in the state of Paraná, Brazil. The plant serves a population of approximately 1,977 residents, classifying it as a small-scale facility within the region's sanitation infrastructure. The plant provides secondary treatment, which is the standard level required under Brazilian regulations (CONAMA Resolution 430/2011 and state-level norms) for inland communities of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids before discharge. The plant treats an average daily flow of 266.11 m³, reflecting the modest scale of the community it serves. The treated effluent is discharged into local water bodies that ultimately drain into the Paraná River basin, one of South America's major river systems. This basin supports diverse aquatic ecosystems and provides water for agriculture, industry, and domestic use downstream. Proper treatment at this plant helps protect water quality in the receiving streams and contributes to the ecological health of the broader watershed.

The plant discharges into local tributaries of the Paraná River basin, which flows through southern Brazil and into the Río de la Plata estuary. The region's subtropical climate supports gallery forests and aquatic habitats that rely on good water quality. Effective secondary treatment reduces nutrient and organic loads, helping to prevent eutrophication and maintain biodiversity in downstream ecosystems.