Seawater Desalination Plant


In general, water is referred to as seawater if it has a salinity of at least 2% (20,000 mg/l), whereby the average salt content in seas is around 3.5% (35,000 mg/l). There are significant fluctuations depending on the region. The salt content in the Mediterranean Sea is around 3.8% (38,000 mg/l) and in the Red Sea or Arabian / Persian Gulf around 4 – 4.5% (40,000 – 45,000 mg/l), while there is a much lower salinity level in the Baltic Sea or Black Sea. With the aid of EcoWa desalination systems, seawater can be processed in such a way that it can be used as drinking water or even as process water for industry and agriculture sector. Minerals and many other unwanted substances, such as chemicals, bacteria, viruses and heavy metals, are also removed from the water.



The design and construction of seawater desalination systems primarily depend on the salinity of the available water, the substances contained in the water, and the parameters required for product water. It is therefore necessary to plan and design the systems on an individual basis, which is often associated with high costs. Standard systems offered at suitable prices often only represent a compromise, as these frequently do not sufficiently meet the individual needs of the customer. Our product range comprises preconfigured systems of various sizes, which are adapted at no extra cost according to the individual needs and requests of our customers. Of course, we can also offer intermediate sizes as well as systems outside of the capacity spectrum. Our preconfigured systems are divided into two series:

EcoWa-SW DDI (capacity: 1,000 – 5,000 l / day)
EcoWa -SW K (capacity: 10 – 90 m³ / day)

System components

  • Steel frame
  • Dosing system
  • Cartridge filter
  • Activated carbon filter
  • System for chemical cleaning
  • High-pressure pump
  • Energy recovery (Just in EcoWa -SW K)
  • Membrane elements in GRP pressure vessels
  • Switch cabinet
  • Measuring devices for pressure, conductivity, flow
  • Control valves, pressure switches

Operating data

  • Salinity feed water: up to 45,000 mg/l
  • Temperature feed water: 10 – 30 °C
  • Required inlet pressure: min. 2-3 bar
  • Salinity product water: max. 500 mg/l
  • Efficiency: 35 – 40 %
  • Maximum operating pressure: 66 – 68 bar
  • Salt rejection: approx. 99 %
  • Energy consumption per m³ of product water: approx. 3-6 kW