Overview
UWWTP_LJUBLJANA ZALOG is a major wastewater treatment plant serving over 370,000 people in Ljubljana, Slovenia. It operates under the EU Urban Waste Water Treatment Directive, ensuring high environmental standards for the Sava River basin.
UWWTP_LJUBLJANA ZALOG is the primary wastewater treatment facility for Ljubljana, the capital of Slovenia, serving a population of approximately 371,320. Located in the Spodnji Kašelj district, the plant is a key component of the city's infrastructure, treating wastewater from residential, commercial, and industrial sources. As a large agglomeration exceeding 150,000 population equivalent, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum and tertiary treatment in sensitive areas. The plant's treatment processes are designed to meet these stringent requirements, ensuring compliance with Slovenian and EU environmental standards. The treated effluent is discharged into the Sava River, which flows through Ljubljana and eventually joins the Danube River, contributing to the Black Sea basin. The plant plays a crucial role in protecting the water quality of the Sava River and downstream ecosystems, supporting aquatic life and recreational uses.
Environmental context
The plant discharges into the Sava River, a major tributary of the Danube, which ultimately flows into the Black Sea. The Sava River supports diverse aquatic ecosystems and is an important water resource for the region. The plant's operations help maintain water quality in this transboundary river system, reducing nutrient loads and protecting downstream habitats.
Frequently asked questions
UWWTP_LJUBLJANA ZALOG is located in the Spodnji Kašelj district of Ljubljana, Slovenia, in the Polje local community.
The plant serves approximately 371,320 people, making it a large agglomeration under EU classification.
The treated wastewater is discharged into the Sava River, which flows through Ljubljana and is part of the Danube River basin, ultimately reaching the Black Sea.
As a Slovenian plant serving over 150,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment and potentially tertiary treatment in sensitive areas.
For a plant of this scale in Slovenia, the EU Urban Waste Water Treatment Directive mandates at least secondary biological treatment. In sensitive areas, such as those draining into the Danube basin, tertiary treatment for nutrient removal is often required.
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