18 october 2017

Campo de Dalías

Preserving water resources through desalination

Campo de Dalias

With a treatment capacity of 97,200 m3/ day, the Campo de Dalías seawater desalination plant in the province of Almería, at the southeast of Spain, is one of the largest desalination plants in Europe.
The project was promoted by Spanish Ministry for Agriculture and Fisheries, Food and Environment, through Water Spanish Society ACUAMED, and required a total investment of 130 million euros, co-financed by European Funds. The Campo de Dalías desalination plant will enable the production of water to supply 300,000 inhabitants and 8,000 hectares of irrigation land in Almería. In planning for future enlargements, the infrastructures have been set up for a capacity of 129,300 m3/day. Among other benefits, the operation of this plant will avoid overexploitation of the aquifers for irrigation purposes, allowing natural regeneration to take place. Construction of the plant, which was completed in November 2014, was led by the Spanish subsidiary of Veolia Water Technologies, as part of the Campo Dalías Joint Venture.
The Campo de Dalías treatment line is comprised of an open water intake from Mediterranean Sea via submarine pipe, double-stage multimedia pressure filtration and a double-pass reverse osmosis process. This first pass consists of six reverse osmosis skids equipped with an Energy Recovery System (ERS) in the form of isobaric chambers. This allows for recovery of up to 95% of the brine pressure which is then transferred to the feed in order to reduce pumping requirements.
The second pass reverse osmosis, also comprised of six skids, is dedicated toward reducing the boron concentration in the permeate water in order to comply with irrigation requirements. The desalinated water is then post-treated through remineralization and an added final disinfection step ensures the product water reaches the delivery points in suitable conditions for both human consumption and irrigation.
The product water distribution network is also part of the work scope which includes the execution of a product water pumping station, a 4.5 km pressure pipeline, an elevated storage tank and a 40 km gravity distribution network which delivers the product water to end users. Environmental protection was a key issue in the design of the plant. Brine is discharged backed to the see via a 2 km pipe equipped with diffusers that have been carefully designed to prevent any disturbance to marine fauna and flora. The whole design of the plant has been made with special emphasis on its integration into the environment and reducing its visual impact thanks to an internal urbanization and careful finish of the main buildings.

Campo de Dalías

Reduces water collection from aquifers to comply with Spain’s sustainability commitment.