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Sector: Drinking water Download PDF

Kirton desalination plants provides 30% of Gibraltar's water

July 26, 2018

Kirton designed, manufactured, operate and maintain a containerised 1500 m³/day Seawater Desalination System to provide high quality drinking water to residential, hotel and apartment complexes in Gibraltar.

The system supplies around 33% of the “Rock’s” consumption and has been installed since 2011. Although only a system build, installation and commissioning project initially, Kirton was at short notice able to offer operational and maintenance manpower which remains the current status.

The system comprises of the following processes:

  • Seawater lift pumps
  • Backwashing 200 micron strainers
  • Ultrafiltration complete with backwashing system
  • Storage and dosing systems for biocide dosing, antiscalant dosing, post mineralisation and sterilisation
  • Water storage tanks
  • Grundfos BMEX-ERI Energy Recovery System
  • RO membrane array consisting of 20 RO pressure vessels and 120 RO Membranes
  • Fully integrated Chemical CIP System
  • Final water storage tank and network distribution feed pumps

Providing 1500 m³/day, the system utilises less than 3 kw/hr per m³ of permeate water produced. With a system recovery of greater than 40%, the unit has supplied over 1,000 ML.


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