Overview
ETE Cajazeiras PB serves approximately 28,205 people in Cajazeiras, Paraíba, Brazil. The plant operates under Brazil's national wastewater regulations for medium-sized agglomerations.
ETE Cajazeiras PB is a municipal wastewater treatment plant located in the Jardim Oásis neighborhood of Cajazeiras, in the state of Paraíba, Brazil. The facility serves an estimated population of 28,205 residents, classifying it as a medium-sized agglomeration within the country's wastewater infrastructure network. The plant is situated in the semi-arid region of northeastern Brazil, an area characterized by seasonal rainfall and periodic droughts. Brazil's wastewater treatment standards are governed by federal regulations, including CONAMA Resolution 430/2011 and the National Sanitation Plan (PLANSAB). For agglomerations of this scale, secondary treatment is typically required to reduce organic load and pathogens before discharge. The plant's operational details, including treatment process and capacity, are managed by the municipal sanitation authority, which ensures compliance with state-level environmental permits issued by the Paraíba environmental agency (SUDEMA). Treated effluent from the plant is discharged into local watercourses that drain into the Piranhas River basin, ultimately flowing into the Atlantic Ocean near the border between Paraíba and Rio Grande do Norte. The receiving waters support agricultural irrigation and provide habitat for fish species adapted to the region's intermittent stream flows. Proper treatment is essential to protect downstream water quality and public health in this water-scarce region.
Environmental context
The plant discharges into the Piranhas River basin, which flows eastward through Paraíba and Rio Grande do Norte before reaching the Atlantic Ocean. This semi-arid watershed experiences seasonal flows, making treated effluent a critical resource for maintaining base flows during dry periods. Downstream ecosystems include riparian forests and small reservoirs that support local biodiversity, including migratory waterbirds and endemic fish species. Effective nutrient removal is important to prevent eutrophication in the lower river reaches and coastal zone.
Frequently asked questions
ETE Cajazeiras PB is located in the Jardim Oásis neighborhood of Cajazeiras, in the state of Paraíba, Brazil. The plant serves the urban area of Cajazeiras, a city in the semi-arid northeastern region of the country.
The plant serves approximately 28,205 people, classifying it as a medium-sized agglomeration under Brazilian wastewater regulations.
Treated effluent from the plant is discharged into local watercourses that are part of the Piranhas River basin, which flows eastward to the Atlantic Ocean. The discharge supports stream base flows in the semi-arid region.
The plant operates under Brazil's federal wastewater regulations, including CONAMA Resolution 430/2011, which sets effluent quality standards. State-level permits are issued by the Paraíba environmental agency (SUDEMA) to ensure compliance with discharge limits.
For medium-sized agglomerations in Brazil, secondary treatment is typically required to reduce biochemical oxygen demand (BOD) and pathogens. Common technologies include activated sludge, stabilization ponds, or anaerobic reactors followed by post-treatment.
Nearby plants