Overview
Frieres wastewater treatment plant serves Llangréu / Langreo in Asturias, Spain, with a population equivalent of 97,900. The facility is located inland and discharges into the local river system.
Frieres is a wastewater treatment plant located in La Riera, Riañu, Llangréu / Langreo, in the autonomous community of Asturias, Spain. It serves a population equivalent of 97,900, classifying it as a large agglomeration under European Union regulations. The plant is situated inland, away from the coast, and its operations are part of the regional wastewater infrastructure managed by the Principality of Asturias. As a large agglomeration, Frieres is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment as a minimum and tertiary treatment if discharging into sensitive areas. The plant's designed capacity is 1.00 (likely in cubic meters per day or similar unit), indicating a substantial facility. The regulatory framework ensures compliance with discharge standards to protect water quality. The plant treats wastewater from the urban area of Llangréu / Langreo and discharges into the Nalón River basin, which flows northward through Asturias and eventually into the Cantabrian Sea (Atlantic Ocean). The Nalón River supports diverse aquatic life and is an important ecological corridor in the region. The plant's performance is critical for maintaining the health of this river system and the downstream marine environment.
Environmental context
The Frieres plant discharges into the Nalón River basin, which drains into the Cantabrian Sea. The Nalón River is the longest river in Asturias and supports a variety of fish species, including salmon and trout, making it ecologically sensitive. The plant's treated effluent must meet strict standards to prevent nutrient pollution and protect downstream habitats, including estuarine areas near the coast.
Frequently asked questions
The Frieres plant is located in La Riera, Riañu, Llangréu / Langreo, in the province of Asturias, Spain.
The plant serves a population equivalent of 97,900, classifying it as a large agglomeration under EU regulations.
The plant discharges treated effluent into the Nalón River basin, which flows into the Cantabrian Sea.
As a Spanish plant serving over 10,000 people, Frieres operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment and potentially tertiary treatment for sensitive areas.
In Spain, plants of this scale typically provide secondary biological treatment, and may include nutrient removal if discharging into sensitive waters like the Cantabrian Sea.
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