The Asturias Water Consortium has awarded Cadagua the operation, maintenance, and conservation service for sanitation and purification systems. Lot 2 – San Claudio river basin (File CAA/2021/368) for a period of 4 years, plus a possible one-year extension.
The system consists of the San Claudio WWTP and a network of 4 km of collectors with 46 manholes. It also includes 4 spillways. The San Claudio WWTP treats sewage from the western part of Oviedo and from the heart of the San Claudio stream basin.
It is sized for an average biological flow of 20,736 m3/day, values corresponding to a population of about 130,290 residents.
It consists of the following process stages: pre-treatment, lamellar primary decanting, biological treatment with biological phosphorus and nitrogen elimination, secondary decanting, and tertiary treatment. It ends with the sludge line with gravity thickening and flotation, in addition to dehydration by centrifuge.
This award strengthens Cadagua’s leading position in the operation and maintenance of wastewater treatment plants, particularly in Asturias, where two other services are already operating: the sanitation and purification systems of the Caudal River and the Lower Basin of the Nalón River.