ROWP Primaria Roiesti sat Ciocaltei - Secondary Wastewater Treatment Plant in Cueni, Romania

ROWP Primaria Roiesti sat Ciocaltei is a municipal wastewater treatment plant located in Cueni, a locality within the commune of Roești, Vâlcea County, Romania. The plant serves a small population of 294 residents, reflecting its role in a rural community. It operates as a secondary treatment facility, which is the standard level required under Romanian and EU regulations for agglomerations of this size. The plant has a designed capacity of 2,500 m³/day, with an actual discharge volume of 78.52 m³/day, indicating significant spare capacity. As a secondary treatment plant, it uses biological processes to reduce organic matter and suspended solids before discharge. The facility is part of Romania's compliance with the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for all inland discharges from agglomerations above 2,000 population equivalent, though smaller plants like this one are also expected to meet appropriate standards. The treated effluent is discharged into a local watercourse that ultimately drains into the Olt River basin, which flows southward to the Danube River and then into the Black Sea. The plant's operation helps protect the local environment and downstream water quality in a region characterized by hilly terrain and agricultural land use.

The plant discharges into a small tributary of the Olt River, which is part of the Danube River basin. The Olt River flows through the Southern Carpathians and the Romanian Plain before joining the Danube near the Bulgarian border. The downstream environment supports diverse aquatic life and is used for irrigation and fishing. The plant's secondary treatment reduces organic pollution, helping to maintain the ecological health of the receiving water body and the larger Danube-Black Sea system.