Design, Construction, Operation and Maintenance of the Desalination Plant in Paphos, Cyprus


Ministry of Agriculture, Natural Resources and Environment of the Republic of Cyprus, WDD




35.000 m3/day potable water





This contract includes the financing, design, construction, maintenance and operation for three years of a seawater desalination plant with the method of reverse osmosis.
In summary, the unit of Paphos desalination consists of the following:

    • Underwater pipeline 600m length, Φ800, from HDPE, for the collection of seawater
    • Johnson Filter at the end of the underwater pipeline at a depth of about -10 meters for the removal of larger particles. The filter is self-cleaned by blowing air and has chlorine disinfection system
    • Pumping station for the seawater, founded by intersecting piles, with 7 pumps with a total capacity 4.200m3 per hour
    • Refining system consisting of 12 sand filters that remove particles with diameter up to 20 microns
    • Second refining system with 10 cartridge filter that remove particles with diameter up to 5 microns with the possible addition of flocculant and disinfectant if required
    • Pumping station for the feeding of reverse osmosis units
    • 7 arrays of reverse osmosis membranes with a capacity of 5,000 m3 / day each
    • 7 high pressure pumps (> 62 atmospheres), one for each array
    • 7 ERI type energy saving systems. (One for each array membrane)
    • 3 arrays of reverse osmosis membranes in second pass for further removal of boron
    • addition systems for gas CO2, lime and caustic soda to correct the acidity and increase the hardness of the product
    • sodium hypochlorite solution addition system
    • clean water pumping station with 7 pumps with a capacity of 250 m3 per hour each
    • pressure pipeline with 5,000 meters length made of ductile cast iron (ductile iron), Φ600, for the transportation of produced water
    • submarine pipeline for the disposal of brine with 1000m length, Φ600 with a diffusers system suitable for the disposal of brine
    • Pressure stainless steel pipes transferring water in various parts of the installation
    • Quality and quantity control systems – on line pH meters, conductivity and residual chlorine. Also, every four hours chemical analysis is performed in the laboratory of the plant for the following parameters parameters of turbidity, color, conductivity, pH and daily water is analyzed for boron, total hardness, alkalinity, calcium, odor, taste and total dissolved solids