ETE Pavuna Wastewater Treatment Plant, Rio de Janeiro, Brazil

ETE Pavuna is a wastewater treatment plant located in the Vigário Geral neighborhood of Rio de Janeiro, Brazil. It serves a population of approximately 5,610 people, classifying it as a small-scale facility within the metropolitan region of Rio de Janeiro. The plant is situated in the Região Sudeste, an area characterized by high urbanization and industrial activity. The plant provides secondary treatment, which is the standard level required under Brazilian regulations for municipal wastewater before discharge. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. As a small agglomeration, the plant contributes to local sanitation infrastructure in a densely populated urban area. The treated effluent from ETE Pavuna is discharged into the local drainage network that ultimately flows into Guanabara Bay, a large coastal bay in southeastern Brazil. Guanabara Bay is an ecologically significant water body that supports diverse aquatic life and is an important resource for local communities. The plant's proximity to the coast (within 10 km) means its discharge can influence coastal water quality and marine ecosystems.

The plant discharges into the local watershed that drains into Guanabara Bay, a large estuarine system connected to the South Atlantic Ocean. Guanabara Bay is a semi-enclosed water body that supports mangroves, fish, and bird species, and is a vital resource for fishing and recreation. The bay faces environmental pressures from urbanization and industrial activities, making proper wastewater treatment crucial for maintaining water quality and ecosystem health.