ETE Vivendas do Arvoredo - Secondary Wastewater Treatment Plant in Três Coroas, Brazil

ETE Vivendas do Arvoredo is a wastewater treatment plant located in Três Coroas, a municipality in the state of Rio Grande do Sul, Brazil. The plant serves a population of approximately 1,597 people, 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 resolutions) for most municipal wastewater. This process typically involves biological treatment to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that are part of the Rio dos Sinos basin, which flows into the Guaíba Lake and eventually the Lagoa dos Patos lagoon system. This watershed supports diverse aquatic life and is important for regional water supply and recreation. Proper treatment helps protect downstream ecosystems and public health.

The plant discharges into the Rio dos Sinos watershed, which drains into Guaíba Lake and then the Lagoa dos Patos, one of the largest coastal lagoons in South America. This lagoon system supports a rich biodiversity, including fish species important for local fisheries. The secondary treatment provided by the plant helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream water bodies.