ETE Olivença Wastewater Treatment Plant - Olivença, Alagoas, Brazil

ETE Olivença is a municipal wastewater treatment facility located in Olivença, within the state of Alagoas in northeastern Brazil. It serves a small population of 120 residents, reflecting its role in a rural or small community setting. The plant is situated in the Ribeira do Ipanema area, part of the broader Região Geográfica Imediata de Santana do Ipanema. The plant provides secondary treatment, which is the standard level required under Brazilian regulations for communities of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring that the effluent meets basic environmental standards before discharge. As a small-scale facility, it operates under the national regulatory framework for basic sanitation, which sets guidelines for effluent quality and water resource protection. The treated wastewater is discharged into the local water system, likely contributing to the Ribeira do Ipanema stream or nearby tributaries. This area drains into the São Francisco River basin, one of Brazil's most important river systems, which flows into the Atlantic Ocean. The plant's operation helps protect downstream water quality and supports the ecological health of the region's aquatic habitats.

The plant discharges into the Ribeira do Ipanema, a tributary of the São Francisco River basin. The São Francisco River is a major waterway in northeastern Brazil, supporting diverse aquatic life and providing water for agriculture, industry, and human consumption. Downstream, the river flows into the Atlantic Ocean, where its estuary supports mangroves and important fish nursery habitats. Protecting water quality in this basin is critical for maintaining regional biodiversity and the livelihoods of communities that depend on the river.