Dissolved Air Flotation Whitewater System^®

Innovative Tube Flocculator

Wastewater is pumped into the DAF Whitewater System® flotation cell through the innovative Tube Flocculator. Treatment chemicals are injected into the Tube Flocculator through multiple ports to achieve maximum liquid / solids separation under easily controlled process conditions. Because of the highly effective mixing energy of the Tube Flocculator, chemical usage is more efficient.

DAF Whitewater System® Process

Simultaneously, a portion of the clean, treated water is recirculated with a pump. 0.5 CFM (cubic feet / minute) air is injected into the suction side of the pump. The air saturated water is pressurized at 100 - 125 psi in the DAF Whitewater System® air / water pressurization header, creating microscopic air bubbles called whitewater because the air saturated water is white. The whitewater is injected into the Tube Flocculator.

DAF Whitewater System® Flotation Cell

In the Tube Flocculator, the microscopic air bubbles attach themselves to the chemically flocculated waste particles, making them strongly buoyant. The Tube Flocculator inlet distribution header provides a uniform flow of the flocculated wastewater into the DAF Whitewater System® flotation cell. The buoyant floc particles rise rapidly to the surface and are skimmed into the float solids sump, ready to dewater. The clean, treated water is discharged.

High Mixing Energy Increases Efficiency, Uses Less Floor Space

The highly effective mixing energy created by the injection of whitewater into the Tube Flocculator greatly reduces the time required for flocculation of the wastewater. This highly innovative process reduces chemical usage and eliminates the need for chemical reaction tanks and mixers, one of the reasons the DAF Whitewater System requires 1/3 the floor space of other systems.

Another reason is the efficiency of the DAF Whitewater System® flotation cell. Because of the rapid rise velocity of the buoyant floc particles, the required surface area of the flotation cell is greatly reduced. Flow rates of 4 - 6 GPM per square foot of surface area are easily achieved.

High Quality Treated Water Can Be Reused

Because the DAF Whitewater System® treated water is of a higher quality than normally obtained from conventional flotation systems, the water can be polished and reused in the plant process.

Upgrading Conventional Flotation Systems

Most conventional flotation systems can be upgraded to a DAF Whitewater System® process by installing a recirculation pump, air injection system, and a Tube Flocculator to replace chemical reaction tanks and mixers. Results are high flow rates, high quality treated water, and low chemical cost.