ETE Arandu Wastewater Treatment Plant - Arandu, São Paulo, Brazil

ETE Arandu is a municipal wastewater treatment plant located in Arandu, a small city in the state of São Paulo, Brazil. The plant serves a population of approximately 3,607 residents, reflecting its role in managing domestic wastewater for this inland community. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. The plant's discharge volume of 569.39 m³/day indicates its operational scale. In Brazil, wastewater treatment plants are regulated under national environmental standards (CONAMA resolutions) and state-level permits, with secondary treatment being typical for communities of this size. The treated effluent is discharged into local water bodies that eventually drain into the Paranapanema River basin, a major tributary of the Paraná River system. This watershed supports diverse aquatic life and provides water for agriculture and human consumption downstream. Proper treatment at ETE Arandu helps maintain water quality in this ecologically important region.

ETE Arandu discharges treated wastewater into local streams that flow into the Paranapanema River, part of the larger Paraná River basin. This watershed drains into the Río de la Plata estuary, supporting a rich array of fish species and providing critical habitat for migratory birds. The region's subtropical climate and agricultural land use make effective nutrient removal essential to prevent eutrophication in downstream water bodies.