This ‘dissolved air’ water stream is then recycled back into the front of the flotation tank, flowing through a pressure reduction valve just as it enters the front of the float tank. This causes the air to be released in tiny bubbles, which form on the surface of any suspended matter in the wastewater and bond with them.

SWA Water’s DAF units employ a unique pressure air saturation pipe to create microfine air bubbles, which enhance the separation of solids, fats and oils from the water phase.

These bubbles eventually cause the matter to float to the surface, where it forms an easily removable layer of froth and leaves the treated and froth-free water to flow out of the flotation tank.

Importantly, our dissolved air system creates micro-fine flotation air bubbles using the unique SWA pressure air saturation pipe, allowing the separation of neutral density and heavy particles. Our DAF units are also capable of removing insoluble particles and oil/grease from a carrier water phase.

The DAF units are made with ease of use in mind, with DAF tanks, air saturators and pipework that are easy to drain and clean. Sampling valves offer easy and safe sample collection, weir plates are easily adjusted, and the pH probes are easily accessed, making every part of the process simple and easy.

We know that each of our clients will have different needs, so we offer design flexibility, full treatment integration and factory-made units from 1m3/h up to 500 m3/h, with larger units able to be constructed on-site.