LOBON Wastewater Treatment Plant, Puebla de la Calzada, Extremadura, Spain

The LOBON wastewater treatment plant is located in Puebla de la Calzada, a municipality in the province of Badajoz, Extremadura, Spain. The plant serves a population of approximately 4,000 people, reflecting its role in managing domestic wastewater for this inland community. Its designed capacity of 6,000 m³/day indicates headroom for future growth or seasonal variations. The plant employs secondary treatment, which is the standard biological process required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological oxidation and sedimentation to reduce organic matter and suspended solids. The plant discharges an average volume of 724.99 m³/day of treated effluent. The treated effluent is discharged into the local watershed, which ultimately drains into the Guadiana River basin. The Guadiana River flows westward through Extremadura and into the Gulf of Cádiz (Atlantic Ocean). The plant's operations help protect downstream water quality and aquatic ecosystems in this semi-arid region of southwestern Spain.

The LOBON plant discharges into the Guadiana River basin, which flows through Extremadura and into the Atlantic Ocean via the Gulf of Cádiz. The Guadiana supports diverse aquatic life and is an important water resource for agriculture and ecosystems in a region characterized by Mediterranean climate with dry summers. The plant's secondary treatment reduces organic pollution, safeguarding the river's ecological health and downstream uses.