Overview
UWWTP Hisarya serves the town of Hisarya in Plovdiv Province, Bulgaria, treating wastewater for approximately 5,147 people. The plant operates under Bulgaria's implementation of the EU Urban Waste Water Treatment Directive.
UWWTP Hisarya is a municipal wastewater treatment facility located in the Mirimir district of Hisarya, a town in Plovdiv Province, central Bulgaria. The plant serves a population equivalent of around 5,147, classifying it as a small agglomeration under EU regulations. As a Bulgarian facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. Bulgaria has transposed the directive into national law, and the plant is expected to meet the relevant effluent standards for biological oxygen demand and suspended solids. The treated effluent from UWWTP Hisarya is discharged into a local watercourse that ultimately drains into the Maritsa River, one of Bulgaria's major rivers flowing into the Aegean Sea. The plant plays a key role in protecting the local watershed and downstream ecosystems from untreated wastewater pollution.
Environmental context
UWWTP Hisarya discharges into a tributary of the Maritsa River, which flows through the Thracian Plain before reaching the Aegean Sea near the Greek-Turkish border. The Maritsa basin supports diverse aquatic life and is an important agricultural and ecological corridor. Proper treatment at Hisarya helps reduce nutrient and organic loads that could otherwise contribute to eutrophication in downstream water bodies.
Frequently asked questions
UWWTP Hisarya is located in the Mirimir district of Hisarya, Plovdiv Province, Bulgaria.
The plant serves approximately 5,147 people, classifying it as a small agglomeration under EU regulations.
The treated effluent is discharged into a local watercourse that flows into the Maritsa River, which ultimately reaches the Aegean Sea.
As a Bulgarian plant, UWWTP Hisarya operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size.
Under the EU Urban Waste Water Treatment Directive, agglomerations with a population equivalent between 2,000 and 10,000 are required to have secondary treatment, which typically involves biological processes to reduce organic matter and suspended solids.
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