ETE ANANAS Wastewater Treatment Plant, Ananás, Tocantins, Brazil

ETE ANANAS is a municipal wastewater treatment plant located in Ananás, a small town in the state of Tocantins, Brazil. The plant serves a population of approximately 856 residents, making it a small-scale facility within the region's sanitation infrastructure. It operates under Brazil's national environmental regulations, which mandate secondary treatment for urban wastewater to protect water resources. The plant provides secondary treatment, a standard level that removes organic matter and suspended solids through biological processes. The plant's discharge volume of 164.40 cubic meters per day indicates its modest scale. Brazilian regulations for small communities require adequate treatment to meet federal water quality standards. The treated effluent from ETE ANANAS is discharged into local water bodies that drain into the Araguaia River basin, a major tributary of the Tocantins River. This river system supports diverse aquatic life and is important for regional biodiversity. The plant's operation helps reduce nutrient and pathogen loads, protecting downstream ecosystems and water users in the Araguaia-Tocantins watershed.

The plant discharges into the Araguaia River basin, which flows into the Tocantins River and eventually reaches the Atlantic Ocean near the Amazon River delta. This watershed supports a rich variety of fish and aquatic species, including migratory fish that rely on clean water for spawning. The region's tropical climate and seasonal flooding patterns make consistent wastewater treatment important for maintaining ecological balance and preventing eutrophication in downstream lakes and rivers.