Desalination of sea water through reverse osmosis

Another of the success stories of ACCIONA's Water business is the Jávea desalination plant. A major engineering and construction project, years of effort and development, which all the inhabitants of this town have been waiting for for years.

After its commissioning in 2002, the people of Jávea enjoyed the quality of the water that came out of the taps within a few weeks. Neighbors, tourists, hoteliers and merchants gained in progress, tranquility and comfort. Gone were the disorders and the summer precariousness with salty or red water by land in pipes, pools or irrigation.

Gone also, the queues to collect water in the water tanks scattered throughout the city leaving a picture of precariousness unbecoming of the XXI century.

General Information

  • Entity: Ayuntamiento Jávea.
  • Location: Jávea, Alicante. Spain.
  • Capacity: 28,000 m3/day.
  • Population: 186,000

Key points

  • Disinfection through the addition of sulphuric acid, sodium hypochlorite and ferric chloride.
  • Pumping of raw water through 5 pumps (4+1 reserve).
  • Sand filtration through 5 (4+1 reserve) metal filters.
  • Conditioning of filtered water through dosage of dispersant / anti-fouling agent.
  • Safety filtration systems composed of 5 pressure containers with a selectivity of 5 microns.
  • Metabisulphate dosage to neutralise the oxidation agent injected in the previous phase.
  • High pressure pumping and energy recovery using 5 turbo-pump groups (4+1 reserve) composed of a pump, motor and Pelton turbine.
  • 4 Frames with 101 pressure tubes per frame and 7 membranes per pressure tube.
  • 45% conversion.
  • Remineralisation through lime and CO2.
  • Treated water tanks of 2,500 m3 and 16,500 m3.
  • Dilution of the rejected brine with dilution of 4:1 with sea water to avoid any impact on the Poseidonia oceanica (sea grass habitat).

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