The Aragón Water Institute has awarded Aqualia two contracts for the operation, maintenance and conservation of the wastewater treatment plants in Bajo Cinca, which include the Fraga, Mequinenza and Zaidín WWTPs, and the Huesca – Almudevar WWTPs, all in the province of Huesca.
The new contract at the Huesca – Almudevar WWTPs is worth over €2 million and has a duration of 3 years. The Huesca facility has the capacity to treat a daily flow of 24,000 m3. Biological treatment is carried out with activated sludge in two aerated lagoons. The sludge produced is stabilised in a single-stage anaerobic digester. The biogas produced is used in a CHP system with electricity generation for self-consumption and heat recovery.
The Almudévar WWTP has a treatment capacity to serve a population of 3,384. Biological treatment takes the form of extended aeration in two aerated lagoons. All the sludge produced is dewatered in centrifuges and sent to composting.
Bajo Cinca WWTPs (Fraga, Mequinenza and Zaidin)
The contract recently secured by Aqualia is worth €1.3 million and has a duration of 3 years. The Fraga plant has the capacity to treat an average daily flow of 5,500 m3. 2 wastewater pumping stations on the right and left bank of the River Cinca pump part of the water treated at the WWTP.
The Mequinenza WWTP treats the wastewater of a 1,500 population equivalent and has an average daily flow of 400 m3. The Zaidín facility treats the wastewater of a population of 2,700.