ETE CONQUISTA Wastewater Treatment Plant, Rio Branco, Acre, Brazil

ETE CONQUISTA is a municipal wastewater treatment facility located in the Horto Florestal area of Rio Branco, the capital of Acre state in Brazil's northern region. The plant serves a population of approximately 7,082 residents, classifying it as a small-scale treatment facility within the urban infrastructure of Rio Branco. The plant operates with secondary treatment, which is the standard biological treatment process that removes organic matter and suspended solids. Secondary treatment typically involves aerobic biological processes such as activated sludge or trickling filters. The plant's discharge volume of 691.20 cubic meters per day indicates a consistent operational capacity for its service area. The treated effluent is discharged into the local watershed, which ultimately drains into the Amazon River basin. As part of Brazil's national wastewater regulations, the plant must comply with CONAMA Resolution 430/2011, which sets effluent quality standards for discharge into receiving water bodies. The plant's secondary treatment level helps protect downstream water quality in the sensitive Amazonian ecosystem.

The plant discharges into the Acre River basin, which flows into the Purus River, a major tributary of the Amazon River. This watershed is part of the Amazon rainforest ecosystem, characterized by high biodiversity and seasonal flooding. The treated effluent contributes to maintaining water quality in a region where aquatic life depends on clean water, and the secondary treatment helps reduce organic pollution that could otherwise impact fish populations and riparian habitats.