Marel Water Treatment B.V.

- Dissolved Air Flotation (DAF)

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With flotation, also referred to as Dissolved Air Flotation (DAF), the ascending ability of suspended solids is increased by adhering microscopic air bubbles to them. This results in a floating layer that can easily be removed.

With flotation, also referred to as Dissolved Air Flotation (DAF), the ascending ability of suspended solids is increased by adhering microscopic air bubbles to them. This results in a floating layer that can easily be removed.

AQUA Industrial Watertreatment offers two different types of flotation units that can both be equipped with a bottom auger for automated sediment removal:

The DAFINCI series
The DAFINCI is a low-maintenance unit that generates an extremely dry sludge (floating) layer, and it is suitable for highly polluted and/or greasy water. The standard installations have a capacity of up to 315 m3/hour (1.050 GPM).

The FH series

  • The FH series is characterised by a large capacity in a compact unit.
  • They are available with a capacity of up to 565 m3/hour (2.500 GPM).

In both the FH series and the DAFINCI series, microscopic air bubbles are created by depressurising the air-saturated water from 4-6 Bar down to atmospheric pressure in the flotation tank. To this end, first a part of the treated water from the flotation tank will be pressurised in a pressure vessel or by using a recirculation pump. The saturated water will then be returned to the bottom of the DAF unit. The difference in pressure creates the desired micro air bubbles.

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