UWWTP kkDijuni - Secondary Wastewater Treatment Plant in Ravadinovo, Bulgaria

UWWTP kkDijuni is a municipal wastewater treatment plant located in Ravadinovo, a village in the Burgas Province of Bulgaria. It serves a population of approximately 3,287 people and is situated near the Black Sea coast, within 10 km of the shoreline. The plant is part of Bulgaria's wastewater infrastructure under the EU Urban Waste Water Treatment Directive. The plant provides secondary treatment, which is the standard level required by the EU Urban Waste Water Treatment Directive for agglomerations of this size. With a designed capacity of 4009 m³/day and an actual discharge volume of 154.3 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variability. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into the Black Sea basin, contributing to the protection of the coastal marine ecosystem. The Black Sea is a semi-enclosed sea with limited water exchange, making it sensitive to nutrient pollution. By treating wastewater to secondary standards, the plant helps reduce the risk of eutrophication and supports the ecological health of the region's coastal waters.

The plant discharges into the Black Sea, a semi-enclosed sea connected to the Mediterranean via the Bosphorus Strait. The Black Sea is highly sensitive to nutrient inputs, which can cause algal blooms and hypoxia. The plant's secondary treatment reduces organic and nutrient loads, helping to protect the coastal marine environment and the diverse aquatic life it supports, including fish and migratory species.