Patented Dissolved Air Flotation:

The SYSDAF patented technology is designed to eliminate the limitations associated with conventional DAF design.

The SYSDAF comprises of the following:

• Initial pH control /Coagulation chamber
• Flocculation Chamber
• Stabilisation Chamber
• Main flotation compartment
• Bottom Hydrosweep system
• Recirculation Chamber
• Final pH control / Discharge Chamber

Floc Formation and Stabilisation:

The first three compartments are dedicated to producing good buoyant floc. This is achieved by introducing microbubbles along with the Coagulant/Flocculant chemicals, this ensures that at the point of floc formation microbubbles are introduced into the aggregate mass of the floc, thereby creating very buoyant Floc. The large compartments ensure sufficient time for floc formation.

Thus microbubbles are introduced all the time during floc formation and stabilisation to ensure maximum adherence of the air to the floc.

Flotation Compartment:

This compartment consists of a flotation modules in series. Each module has recirculated water sweeping the bottom under high pressure and at the same time releasing microbubbles, causing a microbubble blanket about 2m deep. The flocced water overflows into the first module from the top, thus settling or falling floc have to pass through the bubble blanket, ensuring that such floc is relifted to the surface. The high pressure blanket of recirculated water at the very bottom of the module will not allow any settling or sedimentation.

Conventional DAF Technology - Limitations:

The only contact between pre-flocculated wastewater and microbubbles is in a small area at the front of the flotation tank. As there is no further supply of microbubbles in the flotation tank itself, causing both sedimentation in the flotation chamber and carry over of floc into the treated water stream.