CWT’s innovative flocculation and floatation unit is a unique approach and replacement to traditional DAF treatment systems.

The GEM unit can handle a much greater contaminant loading and produce much drier solids, and takes a much smaller footprint than a traditional DAF system.

CWT’s innovative flocculation and floatation unit is a unique approach and replacement to traditional DAF (Dissolved Air Flotation) treatment. The Gas Energy Mixing (GEM) System can generate better results, handle a much greater contaminant loading, adapt to flow changes and produce much drier solids with a much smaller footprint and using less chemicals than typical DAF systems.

Floatation Advancements

The GEM System obsoletes DAF units in terms of floatation efficiency and operation. Where a DAF unit typically operates under the “collision method” theory for flotation, the GEM System is designed to entrain air into the floc and sludge structure, known as the “floc seeding method”.

In the GEM System, the floc seeding method is accomplished with the following steps:

  1. 100% of the waste stream is sent to the GEM System.
  2. The waste stream is exposed to high pressure (100-120 psi).
  3. Air is dissolved into the waste stream using LSGM technology.
  4. Flocculation chemicals are injected into the waste stream using LSGM technology.
  5. The floc is formed in the now air-enriched wastewater.
  6. Dissolved air is now entrapped inside the floc structure.
  7. Water pressure is lowered to ambient.
  8. Dissolved air in floc structure comes out of solution.
  9. Air inside floc expands, pushing out water.
  10. Flocs now float by themselves, as they are now “hollow”.
  11. Clean water and buoyant flocs are delivered to floatation tank.