WSI International
WSI International
Wastewater Treatment and Equipment

Inventory - DAF Systems, Belt Presses

500 GPM

WSI is currently fabricating three R-75-OG DAF systems. These units are skid mounted to allow rapid deployment to field. Each skid contains everything that is required for treatment, including; a feed pump, polymer system, effluent pumps, and controls.
500 GPM DAF Unit

What's Included

500GPM Influent Pump, Dual 500GPM Effluent Pumps, Dual KTM65S DAF Pumps, Dual Sludge Discharge Pumps, Heavy Grit and Solids Pump, Nitrogen Conversion System, 80 Gallon Air Compressor, Level Sensors, Influent Flow Meter, Polymer Batching System, Chemical Metering Pump, Chemical Flow Meter, Integrated Controls, 4G Communication  Equipment
Produced Water Reuse
Produced Water Reuse
Closed Loop Drilling
Closed Loop Drilling
Tail Roller Delivery
Tail Roller Delivery

300 GPM

The R-50OG DAF Unit is designed to handle flows up 300GPM. This unique DAF has two zones that can be used for oil separation or various chemical processes.
300 GPM DAF Unit

50 GPM

This compact unit is the ideal DAF to demonstrate the process capabilities for a larger system. WSI’s DAF (dissolved air floatation) unit, is the best way to separate solids, fats, oils, and greases from a process stream.

The R-15 is designed to fit into trailers and tight spaces for testing purposes.

50 GPM DAF Unit

About Dissolved Air Flotation (DAF) Technology

The DAF unit acts to remove the suspended solids (TSS) from the wastewater source. The DAF pump recirculates DAF effluent and flash mixes it with ambient air (aspirated on the suction side of the DAF pump). The air dissolves into the effluent under the pressure of the pump.

The air-water solution is then passed through a saturation tank to allow additional time for the air to dissolve and to remove any coalesced air bubbles. The solution is then expanded across diaphragm control valves leading into WSI’s proprietary diffusers inside the body of the DAF. By reducing the pressure of the solution rapidly (expanding), the dissolved air is forced out of solution in the form of micro-bubbles (90% of the bubbles formed are less than 10 µm in diameter).

The small bubbles collect under the biomass floc and float it to the surface, forming a thickened sludge blanket on the surface of the DAF that is raked directly into a sludge holding tank. The DAF provides greater thickening of the sludge as well as a reduced footprint from a conventional clarifier. Settled sludge is periodically pumped to the sludge holding tank via a Seepex progressive cavity pump.