Hydrok IFAS™ – Enhanced Biomass Fixed Bed System

The Hydrok IFAS (Integrated Fixed-Film Activated Sludge) system has been developed
utilising the Biotextil Cleartec media for which Hydrok are the appointed
sole UK distributor. When used in conjunction with the Aquaconsult
AEROSTRIP 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.

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 waste
water treatment plant.

A Perfect Partnership

In order 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 Aquaconsult AEROSTRIP 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.

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