ROWP Blajenii de Jos Wastewater Treatment Plant, Blăjenii de Jos, Romania

ROWP Blajenii de Jos is a municipal wastewater treatment plant located in Blăjenii de Jos, a village in Șintereag commune, Bistrița-Năsăud County, Romania. The plant serves a small population of 247 residents, reflecting its role in a rural community. It operates with a designed capacity of 1,500 m³/day and currently discharges 184.90 m³/day of treated effluent. The plant provides secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent (PE) below 2,000. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring compliance with EU effluent quality standards. As a small-scale facility, it contributes to local sanitation and environmental protection. The treated wastewater is discharged into the local watershed, which ultimately drains into the Someș River basin and then into the Tisza River, a major tributary of the Danube. The Danube River flows into the Black Sea, making this plant part of a large transboundary river system. The surrounding area is characterized by agricultural land and small settlements, and the plant helps protect downstream water quality and aquatic ecosystems.

The plant's effluent enters the local watercourse, which flows into the Someș River, a tributary of the Tisza River. The Tisza joins the Danube, which discharges into the Black Sea. This watershed supports diverse aquatic life and is important for regional biodiversity. The plant's secondary treatment reduces organic pollution, helping to maintain water quality in the downstream river system and protect the ecological health of the Black Sea coastal zone.