Signed contract for the construction of the Active Carbon Powder Dosing Facility at the WWTP in Venta Alta

Local news

Planta de tratamiento de de agua Bilbao - Cadagua

This project reaffirms Cadagua and Ferrovial Construction’s contribution to the water supply of the metropolis of Bilbao.

The Bilbao Bizkaia Water Consortium, with the Joint Venture consisting of Ferrovial Construction and Cadagua, has signed the contract to construct the Active Carbon Powder Dosing Facility at the WWTP in Venta Alta.

With the execution of this contract, the WWTP will be equipped to treat the plant’s incoming flow in situations where the characteristics of the water treated are of worse quality than the current ones, whether from the Zadorra or the Nerbioi.

This facility will complement the active carbon filtration currently being refurbished by Ferrovial Construction and Cadagua in a joint venture in the second phase of Alta Sale.

The Venta Alta WWTP is the main water treatment plant in Biscay. It treats the water arriving from the reservoirs of the Zadorra system, which stores 90% of the water that the Consortium supplies to the municipalities belonging to it (with one million inhabitants).

The treatment capacity of these facilities is 7 m3/s.

  • The first phase of 3 m3/s maximum capacity went into service in 1968, and it was the focus of comprehensive refurbishment by Cadagua in 2015.
  • The second phase, with a maximum capacity of 4 m3/s, was designed and built in 1980.
  • In 2007, the new treated water tanks carried out by Ferrovial Agroman went into service; they have capacities of 60,000 m3 and 80,000 m3, respectively.

Cadagua has designed and built more than 235 water treatment plants (drinking, waste, and desalination), reaching a total treatment capacity of more than 15,000,000 m³/d. According to the Maintenance and Use service, the number of equivalent inhabitants served exceeds 21,000,000. These figures put Cadagua in the lead of Spanish companies in this sector.


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