Overview
The Calatayud wastewater treatment plant serves approximately 85,547 people in Calatayud, Aragón, Spain. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
The Calatayud wastewater treatment plant is located in Calatayud, within the province of Zaragoza in the autonomous community of Aragón, Spain. Serving a population of approximately 85,547, the plant is classified as a medium-to-large agglomeration under EU regulations. As a Spanish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent (PE) between 10,000 and 150,000. For larger agglomerations exceeding 150,000 PE, tertiary treatment is mandated in sensitive areas. The plant's scale places it in the category where secondary treatment is the baseline standard. The treated effluent from the plant is discharged into the local water system, which ultimately drains into the Ebro River basin. The Ebro River flows into the Mediterranean Sea, supporting diverse aquatic ecosystems and agricultural activities along its course. The plant plays a key role in protecting water quality in the region.
Environmental context
The Calatayud plant discharges into the local water network that feeds into the Ebro River, one of Spain's major rivers, which flows into the Mediterranean Sea. The Ebro Delta is an ecologically sensitive area that supports diverse aquatic life and migratory bird populations. The plant's treatment processes help reduce nutrient and pollutant loads, contributing to the health of the downstream environment.
Frequently asked questions
The Calatayud wastewater treatment plant is located in Calatayud, in the province of Zaragoza, within the autonomous community of Aragón, Spain.
The plant serves approximately 85,547 people, classifying it as a medium-to-large agglomeration under EU regulations.
The treated effluent is discharged into the local water network, which ultimately drains into the Ebro River basin and then into the Mediterranean Sea.
Under the EU Urban Waste Water Treatment Directive (91/271/EEC), the plant, serving around 85,547 people, is required to provide at least secondary treatment. For agglomerations over 150,000 PE, tertiary treatment is mandated in sensitive areas.
In Spain, wastewater treatment plants serving populations around 85,000 typically provide secondary treatment as a minimum, in compliance with the EU Urban Waste Water Treatment Directive. Some plants may also incorporate tertiary treatment to meet local environmental requirements.
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