At the forefront of the Watermark Projects product range are our Dissolved Air Flotation systems which are designed and manufactured in-house.


The Dissolved Air Flotation or DAF treatment process is designed for the efficient removal of COD, suspended solids and fats, oils and greases from the effluent stream. The system utilises fine air bubbles, also known as ‘White Water’, which attach themselves to the suspended material within the waste stream, increasing buoyancy and floating them to the surface. The floated solids are then removed by a simple but effective scraper mechanism. More often than not chemical conditioning is used to increase the effectiveness of the Dissolved Air Flotation process.

The Watermark Dissolved Air Flotation process uses the most reliable and positive method of producing air bubbles of the optimum size. This is done by dissolving air into water under pressure and then dropping the pressure on entry to the DAF cell using a controlled nozzle orifice. As the pressure is reduced, the air naturally comes out of solution in the form of micro bubbles.

Watermark Projects - Dissolved Air Flotation

The Watermark Projects DAF systems are designed to offer a complete wastewater treatment solution with on board chemical mixing vessels, dilute polymer make-up system, complete PLC control panel, pH control and level controllers for automatic operation.


  • Up to 9,000 litres per hour
  • 4,000 x 2560 mm sq.

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  • Up to 20,000 litres per hour
  • 5,380 x 2560 mm sq.

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  • Up to 40,000 litres per hour
  • 10,000 x 2560 mm sq.

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Shown above are our skid mounted DAF range. These units range from 3,000 to 40,000 litres per hour. The skid mounted design allows our DAF systems to be fabricated, delivered and installed more efficiently as they are effectively one piece.

Our dissolved air flotation water treatment systems are not limited to just these skid mounted units. we also offer a bespoke range whereby a custom DAF unit will be fabricated with your requirements in mind. These units can reach but are not limited to 200,000 litres per hour.

Watermark Projects can offer a trial DAF to see what our DAF systems can offer you before purchasing. Additionally, you can rent a DAF if you are looking for a more flexible option. 

All of our DAF systems offer a reduction rate of up to:

80% of chemical oxygen demand (COD)

98% of total suspended solids (TSS)

99% of fats, oils & greases (FOG)

WMP Hats


Not sure if the DAF system is right for your effluent? Contact the Watermark Projects team today to arrange a free, no obligation site visit which includes a wastewater sample analysis, feasibility study & return on investment report.

Need help? Get in touch now for a quotation, advice or information.