Tap Water from the Sea,

and from other Non-Drinkable Water Sources

Drinking water, affordable, energy-efficient, easy to deploy.


How does our Water-to-Water-technology work?

Using a membrane distillation process, water is evaporated under low pressure through a heat pump condensation process. The vapor produced by heating the water then passes through the membrane.

Unlike reverse osmosis, where water with dissolved salts and other solids is forced through the membrane, this membrane only allows water vapor to pass through.

The pores in this membrane are larger than the pores in reverse osmosis membranes, so less pressure, and thus less energy is required.

The driving force of this technology is the partial pressure difference (temperature difference) between both sides of the membrane.

The Water-to-Water system can be efficiently powered by wind, sun, grid, generator, or combinations. The water can be produced near where it is used, eliminating transport and distribution costs.

Of course, the supply of seawater or groundwater also determines the location.

The Water-to-Water units can produce up to 37,500 liters of drinking water per day, which can be scaled to 75,000, 150,000 liters, or more.


Endorsed by the EU

The Water-to-Water (W2W) project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 873854. You can find more information on the website of the European Union.


Water-to-Water features:

  • Produces drinking water from seawater, brackish, or contaminated water
  • Up to 37,500 liters of drinking water per day per machine
  • For large-scale installations, multiple units can be combined
  • Very energy-efficient
  • Choice of power sources: wind, solar, grid, generator, or hybrid combinations

Where and when is the Water-to-Water technology applicable?

  • for communities with insufficient or no access to freshwater, and close by a big enough supply of seawater or contaminated water
  • for companies looking for energy-efficient technologies to clean and potentially reuse waste-water
  • for cities and regional administrations that want to restore rivers, lakes, and harbors

The Water-to-Water unit can be powered by various power sources, including a wind turbine. Check this video to discover the technology used.