Biograd na Moru Kumenat Wastewater Treatment Plant, Zadarska županija, Croatia

Biograd na Moru Kumenat is a wastewater treatment plant located in Zadarska županija, Croatia, near the coastal town of Biograd na Moru. The plant has a designed capacity of 27,325 cubic meters per day, indicating it serves a medium to large agglomeration. It operates under Croatian national regulations aligned with the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides primary treatment, which involves physical processes like sedimentation to remove solids. Under the EU UWWTD, primary treatment is generally acceptable for discharges into less sensitive coastal waters, but for agglomerations over 10,000 population equivalent, secondary treatment is typically required. The plant's coastal location and treatment level may influence its regulatory obligations. The treated effluent is discharged into the Adriatic Sea, a semi-enclosed marine environment with limited water exchange. The Adriatic Sea supports diverse marine life, including seagrass meadows and fish populations, and is an important ecological and economic resource for Croatia. The plant's discharge contributes to local water quality management in the coastal zone.

The plant discharges into the Adriatic Sea, a semi-enclosed basin connected to the Mediterranean. The coastal waters near Biograd na Moru support seagrass habitats and marine biodiversity, and are used for tourism and fisheries. The plant's primary treatment level means that only basic solids removal occurs, with nutrients and pathogens largely untreated, which can impact local water quality in the nearshore environment.