ROWP Primaria Orlesti Wastewater Treatment Plant, Silea, Vâlcea County

ROWP Primaria Orlesti is a municipal wastewater treatment plant located in Silea, a village in Orlești commune, Vâlcea County, Romania. The plant serves a small population of 433 residents, reflecting its role in a rural community. It operates under Romania's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 807 m³/day and a current discharge volume of 72.39 m³/day, the facility operates well below its capacity, indicating it can accommodate future growth. The plant's discharge is regulated under Romanian environmental permits aligned with EU standards. The treated effluent likely discharges into a local watercourse within the Olt River basin, which flows southward into the Danube River and eventually the Black Sea. The plant's operation helps protect downstream water quality in this ecologically significant region, supporting aquatic life and reducing nutrient loads to the Danube Delta.

The plant discharges into a tributary of the Olt River, which flows through the Carpathian foothills into the Danube River. The Danube then reaches the Black Sea via the Danube Delta, a vast wetland that supports diverse aquatic life and serves as a critical migratory corridor for birds. The plant's secondary treatment reduces organic pollution and helps maintain water quality in this downstream ecosystem.