ETE Ribeirao Aquidaba - Secondary Wastewater Treatment in Marialva, Parana

ETE Ribeirao Aquidaba is a wastewater treatment plant located in Marialva, within the state of Parana, Brazil. The facility serves a population of approximately 5,073 people, classifying it as a small-scale municipal treatment operation in the southern region of the country. 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 the effluent meets basic quality standards before discharge. The treated effluent is released into the local watershed, which ultimately drains into the Parana River basin, one of South America's major river systems. This basin supports diverse aquatic ecosystems and is important for regional water supply and agriculture. Proper treatment at this plant helps protect downstream water quality and ecological health.

The plant discharges into the Parana River basin, a major watershed that flows through Brazil, Paraguay, and Argentina before reaching the Rio de la Plata estuary. The basin supports diverse aquatic life, including migratory fish species, and is ecologically sensitive to nutrient pollution. Secondary treatment reduces organic load and helps maintain water quality in this important river system.