flotation air bubbling

Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by removing the suspended matter such as oil or solids. Air is firstly dissolved in the water or wastewater under pressure and it is afterwards released at atmospheric pressure in a flotation tank basin. The suspended matter starts floating due to the tiny bubbles formed by the released air into the water which pushes the suspended matter to the surface thus facilitating the removal of the matter using a skimming device.

The DAF systems by STC include the following equipment:

  • Tank in Stainless Steel AISI 304
  • Discharge channel with adjustable height
  • Collection System for Floating material
  • Discharge Hopper for floating sludge
  • Piping for raw water blending with additives (pH corrector, coagulants, polyelectrolyte) before the release into the tank
  • Pressurized recirculation manifold composed of pressurization pump with body and impeller in stainless steel, saturation tube in steel, membrane pressure regulation valve
  • Compressed air pneumatic system composed of filter, control solenoid valve, flow meter for flow rate regulation
  • Electrical control and automation panel installed on the machine