ETE Manoel dos Arroz - Wastewater Treatment Plant in Petrolina, Pernambuco, Brazil

ETE Manoel dos Arroz is a wastewater treatment facility located in Petrolina, a city in the state of Pernambuco, Brazil. The plant serves a population of around 19,034 residents, placing it in the small-to-medium agglomeration category. Its location in the semi-arid São Francisco River basin influences the local water management priorities. As a Brazilian wastewater treatment plant, ETE Manoel dos Arroz is subject to CONAMA Resolution 430/2011 and other federal regulations that set discharge standards for treated effluent. For agglomerations of this size, secondary treatment is typically required to reduce organic load and suspended solids. The plant's treated effluent likely discharges into a local watercourse that ultimately reaches the São Francisco River, one of Brazil's most important rivers. The São Francisco River flows eastward to the Atlantic Ocean, supporting diverse aquatic ecosystems and providing water for agriculture, industry, and human consumption. Protecting this river from nutrient pollution and pathogens is critical for downstream communities and biodiversity.

The plant's receiving water body is likely a tributary of the São Francisco River, which drains into the Atlantic Ocean. The São Francisco River basin is ecologically significant, supporting diverse fish species and providing water for irrigation in the semi-arid Northeast region. Proper treatment helps prevent eutrophication and protects downstream water quality.