ETE ENG SILVINO STREVA - Secondary Wastewater Treatment Plant in Volta Redonda, Brazil

ETE ENG SILVINO STREVA is a municipal wastewater treatment plant located in Volta Redonda, within the state of Rio de Janeiro, Brazil. The facility serves a population of approximately 4,458 residents, classifying it as a small-scale treatment plant under Brazilian sanitation standards. It is situated in the Paraíba do Sul river basin, a region with significant industrial and urban activity. The plant provides secondary treatment, which typically involves biological processes to remove organic matter and suspended solids. Secondary treatment is the standard requirement for municipal plants in Brazil under CONAMA Resolution 430/2011. The plant's discharge volume is 717.86 cubic meters per day, indicating consistent operation within its designed capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Paraíba do Sul River. This river is a critical water source for the region, supplying drinking water to millions and supporting diverse aquatic ecosystems. The plant plays a key role in protecting downstream water quality and public health.

The plant discharges into the Paraíba do Sul River basin, which flows through the states of São Paulo, Rio de Janeiro, and Minas Gerais before reaching the Atlantic Ocean near Campos dos Goytacazes. The river supports a rich diversity of fish and other aquatic life, and its waters are used for drinking, irrigation, and industrial purposes. The region's tropical climate and seasonal rainfall patterns influence the river's flow and the dilution capacity for treated effluent.