Ujlengyel Szennyviztisztito Telep - Secondary Wastewater Treatment Plant in Újlengyel, Hungary

Ujlengyel Szennyviztisztito Telep is a municipal wastewater treatment plant located in Újlengyel, a village in Pest County, Hungary. The plant serves a population of 2,133, classifying it as a small agglomeration under Hungarian and EU regulations. It is situated in the Közép-Magyarország region, approximately 40 km southeast of Budapest. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. With a designed capacity of 7,453 m³/day and an actual discharge volume of 251.44 m³/day, the plant operates well below its capacity, indicating room for future growth. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that ultimately drain into the Danube River basin. The Danube is a major European river flowing into the Black Sea, supporting diverse aquatic ecosystems. The plant's operation helps protect downstream water quality in the Danube catchment, which is ecologically sensitive and supports migratory fish species and rich biodiversity.

The plant discharges into local streams that are part of the Danube River basin. The Danube flows through Hungary and several other countries before reaching the Black Sea. This watershed supports diverse aquatic life, including migratory fish species such as sturgeon. The plant's secondary treatment reduces organic pollution, helping to maintain water quality in the downstream environment.