Sant Llorenç d'Hortons Wastewater Treatment Plant, Catalunya, Spain

The Sant Llorenç d'Hortons wastewater treatment plant is located in the Alt Penedès region of Catalunya, Spain. It serves the municipality of Sant Llorenç d'Hortons, a small town in the province of Barcelona. The plant has a designed capacity of 2,000 cubic meters per day and treats wastewater for a population of 1,561. As a secondary treatment facility, the plant meets the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations with a population equivalent (PE) between 2,000 and 10,000. The plant's discharge volume is 416.03 cubic meters per day, indicating a utilization rate well within its design capacity. The treated effluent is discharged into a local watercourse that eventually drains into the Mediterranean Sea. The plant plays a key role in protecting the local watershed and downstream ecosystems, including the Llobregat River basin, which supports diverse aquatic life and is an important water resource for the region.

The plant discharges into a local stream that flows into the Llobregat River, which ultimately reaches the Mediterranean Sea. The Llobregat basin is ecologically sensitive, supporting diverse aquatic species and providing water for agriculture and urban use. The plant's secondary treatment helps reduce nutrient loads and organic pollution, protecting downstream water quality and marine habitats.