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Dissolved air flotation systems (DAF) are a wastewater treatment process that floats and flocculates particles in wastewater that removes suspended matter like oil or solids. It works by dissolving air in the water under pressure and releasing the air at atmospheric pressure in a flotation tank basin. The released air forms tiny bubbles which adhere to the suspended waste matter causing it to float to the surface, where a skimming device removes it.Clean Water Technology can retrofit your dissolved air flotation system with our patented GEM® System technology. The DAF retrofit installs easily using the existing DAF tank and yields two () to three () times more capacity for cleaning wastewater.

Through aerating % of the wastewater under constant flow, the GEM® System creates many more bubbles than a conventional DAF system, to which waste particles of large or nano size (and in between) can attach.Using a series of liquid-solid gas mixing (LSGM) heads (usually ,) a vortex is created that allows the bubbles to spin at various mixing speeds and energies.Pressure is dropped in each head under strict control.  This is important because smaller particles are more apt to attach to particles similar in size – all the way to nano-bubbles.  This means that the GEM System can achieve % removal of TSS (total suspended solids) with no carry-over or pin flocs.

Between heads -, polymers are directly injected under pressure, continuing through the vortex.  As the polymers enter the LSGM heads, they uncoil, availing more charge sites to attach to more waste particles.  (See Chemistry of the GEM System.) By the time the wastewater enters the flotation tank, the solids and liquids are already separated.  The flotation tank is used only to skim the solids

Al Ghalowa helps the client to assess the water quality of the intake and propose the design and supply the proper water desalination technology for industrial and municipal applications. Based on the water quality of the source, we can select among the various desalination processes such as Reverse osmosis (RO) and Nanofiltration (NF) which use a pressure-driven membrane process or Electrodialysis Reversal (EDR) processes which are driven by direct current (DC) in which ions flow through ion-selective membranes to electrodes of opposite charge.