Integrated Fixed-Film Activated Sludge

Enhanced Biomass Fixed Bed System

The ELIQUO HYDROK IFAS (Integrated Fixed-Film Activated Sludge) system has been developed utilising the Biotextil Cleartec media for which ELIQUO HYDROK are the appointed sole UK distributor. When used in conjunction with the Aquaconsult AEROSTRIPĀ® diffusers this system offers even further efficiencies within the treatment process.

Biotextil Cleartec is a textile product made of 100% polypropylene which by the nature of its construction creates a large specific surface area on which biomass can grow. The construction of the material permits good oxygen supply and prevents excessive growth of thick layers of biomass thus maintaining the optimum efficiency of the process.

Integrated Fixed-Film Activated Sludge

How it works

The Biotextil Cleartec curtains are positioned directly above the diffusers, housed in a removable frame, set parallel to the flow. The configuration of the material allows for flexibility and movement within the flow of the tank, leading to an enhanced performance, this in turn increases the capacity of the wastewater treatment plant.

To maximise the volume capacity of the treatment tank, diffusers should be as close to the base as possible with the Biotextil Cleartec curtains positioned ideally between 40cm and 60cm above the diffusers. The best possible scenario is the combination of the low profile ultra-fine bubble diffusers and the Biotextil Cleartec media.

The curtains are set to allow the flow to pass between them horizontally, with the diffusers creating a vertical flow. As a result, the curtains are in constant motion and if thicker active sludge layers should attempt to settle on the material these are shaken off and removed as a result of the movement. This 'shedding' process prevents blockages and maintains optimum efficiencies and minimum energy requirements.

ELIQUO HYDROK are able to construct a bespoke cage system which incorporates both elements, this allows them to be lifted for routine maintenance without interfering with the operational activity of the plant.

Cleartec/AEROSTRP combined system
Cleartec/AEROSTRP combined system

In summary

  • Increased performance
  • Excellent nitrogen elimination
  • Reduction of surplus sludge
  • No blockages of the textile curtains
  • Reduced energy requirement

IFAS System

A highly efficient partnership between fixed bed media and diffusers