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AQUALITY® Membrane Filtration

Increasing water efficiency with membrane technology

Closing the water loop with membrane technology

Our AQUALITY®membrane Ultra-filtration and Reverse Osmosis solutions are designed for closing the water loop. Although both use membranes as a barrier, the process of reverse osmosis is not the same as filtration.

Filtration is the removal of particles by size exclusion, while in reverse osmosis such physical holes may not exist. With reverse osmosis, water is able to diffuse through the membrane polymer by bonding between segments of the polymer's chemical structure.

Our AQUALITY® membrane technology produces high-quality water and integrates seamlessly in any existing wastewater treatment or water recovery plant.

  • AQUALITY® UF Ultrafiltration
  • AQUALITY® RO Reverse Osmosis
  • AQUALITY® HRRO High Recovery Reverse Osmosis

AQUALITY® UF. Setting a barrier to bacteria

Our AQUALITY® Ultrafiltration (UF) is a variety of membrane filtration in which hydro-static pressure forces a liquid against a semi-permeable membrane. The permeable membrane becomes a barrier to suspended solids and bacteria, producing water with very high purity and low silt density.

Ready for drinkwater and Reverse Osmosis applications

The filtrate is typically characterized by a complete removal of suspended solids, a log 5 reduction (>99.999%) of bacteria such as Cryptosporidium, a filtrate turbidity <0.1 NTU (no matter what the feed-water turbidity is) and an SDI (Silt Density Index) < 2.

This means that the filtrate is ready for reuse in drinking water applications or is perfectly pre-conditioned to serve as feedwater for a reverse osmosis installation.

AQUALITY® RO. Removal of salts and viruses

The AQUALITY® Reverse Osmosis technology makes use of semi-permeable membranes for the removal of dissolved salts and potential viruses from the feed water after suspended solids, viruses and colloidal material have been removed in a previous filtration step.

While ultra-filtration will retain suspended solids, AQUALITY® RO will retain dissolved solids.

Cross-flow filtration

The AQUALITY®RO desalination process uses a pump and a semi-permeable membrane. The pump provides the driving force for the separation, while the semi-permeable membrane passes water in preference to the solute that is dissolved in the water. The majority of the solute is left behind to form a more concentrated stream. Since feed and concentrate stream move tangentially to the membrane, the filtration principle is called cross-flow filtration.


  • Seawater desalination
  • Desalination of brackish water
  • Production of highly purified process water
  • Production of drinking water from any water source

Used in the following industries

AQUALITY® High Recovery Reverse Osmosis

AQUALITY® HRRO is an advanced Reverse Osmosis allowing to boost water recovery from 75 up to 95 percent.

Traditional reverse osmosis is designed in a sequential multi-membrane, multi-stage configuration, each membrane making a small contribution to the overall water recovery. Improved recovery is only achieved in adding RO stages, requiring higher Capex, Opex and footprint.

AQUALITY® HRRO features equal feed and permeate flow rates. At a predefined set point, the system automatically flushes out all the concentrate, returning to its normal operation mode. By increasing the cycles within the same configuration, recovery rates up to 95% can be achieved.

When to use AQUALITY® HRRO?

  • As a smart alternative for RO
  • In a combination of feed-water + RO concentrate recovery
  • As a brine concentrator
  • When fluctuating inlet conductivity
  • To reduce chemicals consumption in the production of demin water
Water recovery facility
Water recovery facility


  • Ultimate water recovery: up to 98%
  • Reducing waste from 50 up to 85%
  • Resilience and Reliability
    • Reduced scaling, fouling, clogging
    • 4 to 6x less frequent cleanings
    • Longer membrane lifespan
  • Optimized utilization of treatment capacity
  • Automated monitoring and reporting of critical parameters


  • Process water production
  • Pure water supply
  • Wastewater reuse
  • Ingredient water
  • Boiler water
  • Brackish water desalination
  • Drinking water production

Used in the following industries

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