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Eliquo Hydrok Ltd became a member of the Eliquo Water Group in 2016 through the acquisition of Hydrok UK Ltd by ELIQUO WATER GROUP GmbH . As a result of this, the company has been able to add to the already existing extensive solution and product portfolio that includes solutions for wastewater management, wastewater treatment, clean water treatment and surface water management, by the introduction of proprietary biosolids and nutrient management technologies. The new products along with a strong technology portfolio that includes CSO screens, flow controls, Mecana tertiary filtration, high-efficiency aeration technology, IFAS Fixed Bed Media, MBR Bio Reactors. and UV disinfection to mention just a few. Eliquo Hydrok provide Water Engineering Solutions to all manner of complex and simple problems. The experienced in-house design teams are available to help identify and discuss the requirement and, should any of our standard products not be the perfect solution, our in-house manufacturing facility enables us to produce bespoke designs to suit a particular need. Eliquo Hydrok are also the exclusive UK distributor for a number of leading European specialist manufacturers.


Mr David Armstrong
Warren RoadIndian Queens Ind EstIndian Queens

St Columb

Eliquo Hydrok Aeration and IFAS systems

At the root of each Eliquo Hydrok aeration solution is an Aquaconsult AEROSTRIP®  diffuser. This range of ultra fine bubble diffusers transfer oxygen to effluent more effectively than any other type. This efficiency allows the designers at Eliquo Hydrok to reduce blower sizes, reduce air main diameters, and make savings on valves and other hardware.

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Ultra-Fine Bubble Diffusers

Energy efficiencies in the range 40% over existing systems are being provided. By adopting the Eliquo Hydrok solution, immediate cost savings can be gained, or perhaps more significantly, existing plants can be upgraded - with the increased efficiency the capacity of an existing plant can be increased, sometimes eliminating the need for costly civil structures or new sites.

The operational life of an Aquaconsult diffuser is typically in the range of 14-20 years, and with the unique way in which the membranes self- clean, whole life costs are reduced, and man entry into tanks for maintenance purposes is avoided.

The increased efficiency of the Aquaconsult AEROSTRIP® diffuser is due to the very fine bubble that is generated - this presents a greater surface area for any given volume of air to the flow compared to any other system. However, increased efficiency is also provided due to the general arrangement of the diffusers and the fact that they are secured directly to the tank floor; this increases contact time, and the curtain effect of the bubble pattern avoids dead areas.

  • Flat design, allowing the ‘AEROSTRIP®’ to be fastened directly to the floor of the tank
  • Capable of intermittent operation allowing for both nitrification and de-nitrification
  • Water flow created by a mixer is not hindered by the diffusers, unlike a dome design
  • No precipitations can occur underneath the diffusers
  • Oxygen transfer efficiency up to 60%
  • Aeration efficiency 3 to 5 kg O2/kWh
  • 0 to 100% control of air flow range
  • Non-clogging diffuser membrane
  • Low maintenance requirements and costs
  • Extended operational life expectancy


IFAS – 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 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 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.

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