ETE Renato dos Santos Wastewater Treatment Plant, Várzea Grande, Mato Grosso

ETE Renato dos Santos is a wastewater treatment plant located in Várzea Grande, Mato Grosso, Brazil. The plant serves a small population of 440 people and discharges 40.16 units of treated wastewater. It is situated in the Cuiabá metropolitan region, an area with growing urban and industrial activity. The plant provides secondary treatment, which is the standard level required under Brazil's national wastewater regulations for communities of this size. Brazilian law, through CONAMA resolutions and state environmental agencies, mandates secondary treatment to reduce organic load and protect water quality. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The treated effluent is discharged into the local watershed, which ultimately drains into the Cuiabá River, a major tributary of the Paraguay River basin. This basin is part of the Pantanal, one of the world's largest tropical wetlands and a critical ecosystem for biodiversity. The plant's operation helps reduce pollution loads entering this sensitive aquatic environment.

The plant discharges into the Cuiabá River watershed, which flows into the Paraguay River and eventually the Pantanal wetlands. The Pantanal is a vast floodplain ecosystem that supports diverse aquatic life, including fish, birds, and reptiles. Effective wastewater treatment is crucial to prevent nutrient enrichment and maintain water quality in this ecologically sensitive region.