ETE Terminal Rodoviario - Secondary Wastewater Treatment Plant in Petrópolis, Rio de Janeiro

ETE Terminal Rodoviario is a wastewater treatment plant located in the Bingen neighborhood of Petrópolis, in the state of Rio de Janeiro, Brazil. The plant serves a small population of 736 residents, reflecting its role in local sanitation infrastructure within the mountainous region of the Serra dos Órgãos. As a secondary treatment facility, the plant provides biological treatment to reduce organic matter and suspended solids. Secondary treatment is the standard required under Brazilian regulations (CONAMA resolutions) for municipal wastewater, ensuring compliance with discharge standards. The plant's daily discharge volume of 172.80 m³/day indicates its modest scale. The treated effluent is released into the local water system, which ultimately drains into the Piabanha River, a tributary of the Paraíba do Sul River. This river basin is ecologically significant, supporting diverse aquatic life and providing water for downstream communities. The plant's location within 50 km of the coast means its discharge contributes to the broader watershed that reaches the Atlantic Ocean near Rio de Janeiro.

The plant discharges into the Piabanha River watershed, which flows into the Paraíba do Sul River, one of Brazil's most important rivers. The Paraíba do Sul basin supports diverse ecosystems, including Atlantic Forest remnants, and provides water for millions of people. Downstream, the river reaches the Atlantic Ocean near Campos dos Goytacazes. The region's steep terrain and seasonal rainfall make proper wastewater treatment critical to prevent nutrient enrichment and protect aquatic habitats.