Separation of suspended solids and liquids

cone The airlift vacuum column can be used to separate suspended solids or liquids from the water. It is possible to extract from water more than 99% of the particles having a size of 0.3 to 100 micro-meters, but also oil and hydrocarbons!

The airlift column vacuum uses the principles of adsorption and flotation governed by Stokes law to achieve the extraction of the particles in water:

adsorption COLDEP

Suspended particles are absorbed on the outskirts of the bubbles by electrostatics and surface tension

The bubbles absorbe the particles rising to the surface. When bursting, they cause a concentration of particles by skimming at the top of the column and can easily be extracted

adsorption2 COLDEP


COLDEP low energy system allows to:

  • Filter seawater below 3 SDI in a few hours
  • Concentrate up to a 100-fold suspended particles in water
  • Achieve these results without any chemical additive