Water Treatment

Water Treatment focuses on making innovative solutions available for water-related issues for the industrial, agricultural and urban sectors. The emphasis lies on developing decentralised water treatment units that produce for-use water qualities and can be used throughout the water chain. The driving force behind this is the increasing fresh water scarcity and salinity.

Memstill module

Water Treatment is geared to the development of innovative, decentralised water-treatment concepts in the urban and industrial environment: the focus lies on developing and implementing new, (patented) water technologies for water preparation, purification and cycle closure to enable reuse and efficient utilisation of water and energy, the reduction of the emissions of toxic and environment-alien substances to the surface water and the recovery of valuable components (nutrients/minerals). TNO's well equipped research facilities can develop new technologies and concepts of lab experiments via pilots to on-site demos. The Water Treatment expertise group has built up considerable knowledge and experience of membrane separation methods like membrane distillation and pertraction as well as other physical separations process like solvent extraction, adsorption, crystallisation, advanced oxidation and electrochemistry. For biochemical processes (communal waste water processing) there is cooperation with the Microbiology and Systems Biology expertise group.

Our expertise

Water Treatment demonstrates water technologies for closing the water cycle and reuse of nutrients in greenhouse horticulture, the built environment, industry and agriculture:

  • Greenhouse horticulture: preparing good water quality (for bioproduction) and closing the water cycle through the use of membrane distillation, recovery of nutrients and and disposal of pesticides.
  • Industrial water: reuse of water via membrane systems, processing toxic substances and brine reprocessing.
  • Agricultural drainage water: removing phosphate with electrocoagulation.
  • Built environment: Development of water-autarkic hotel from rainwater as well as sustainable water in hospitals (legionella and medical agents from wastewater)
  • New Technologies to be developed are: Electricity production from waste heat during membrane distillation (Mempower), prevention of scaling (Prevscale) and bioalarm.

Applications and impact

Examples of projects:

  • Drinking water from saltwater with residual heat in Aruba (in preparation)
  • Aquafit4Use: Sustainable Water Use in Industry; 20% water reuse
  • Tigi (Towards Innovative Galvanic Industry): removal of Zn and Fe from passivation baths
  • Nametech: prevention of biofouling on membranes
  • E4Water: 30% water saving in the chemical industry
  • Chemwater: Vision and roadmap for sustainable water in industry in 2050
  • New approach to reducing priority substances in water in horticulture with BBA
  • Puridrain: phosphate removal from agricultural drainage water
  • Greenhouse Horticulture Waterproof: closing the water cycle in greenhouse horticulture
  • Removing toxic components from waste water in the chemical industry
  • Disinfection of swimming pools with in-situ prepared hydrogen peroxide
  • Good pouring water: preparing suitable watering for bioproduction from waste water
Our work


TNO provides the water industry with tests, consultancy, research and development, typically on project basis. We often cooperate with membrane producers, equipment builders, engineering contractors,... Read more
Our work

Sustainable drinking water with Memstill®

Demand for drinking water continues to grow, especially in densely populated areas. TNO has developed Memstill®, a new technology that desalinises seawater and makes it clean and drinkable. Memstill®... Read more
Our work


Sea water desalination is regarded world-wide a very promising technology to provide water to the growing world population at a reasonable cost. Currently, the total desalination volume increases with... Read more
Our work

Energy intensification

Process industry uses a lot of energy, which is costly and may result in global warming. Part of the energy consumption is connected to water, either because water is used to heat or cool processes or... Read more
Our work

Water recycling

Water recycling in industry is often an elegant way to reduce water consumption. Waste water of high quality forms an excellent method to optimize water chains. Water recycling often leads to energy and... Read more
Our work


Water often has be treated to remove microbiological contamination. Examples are water for drink or food preparation, drinking water, treated waste water and pool water. A wide range of membrane technologies... Read more
Our work

New approach to reducing emerging compounds in water

Emerging compounds are all manner of unwanted substances that seep into the water supply. Because they are a risk to humans and the environment, reducing these emissions is crucial. This requires new... Read more
Our work

New approach to reducing priority substances in water

Priority substances pose a considerable risk to the water environment. In the light of the Water Framework Directive, it is essential to reduce these substances. This makes new management strategies necessary.... Read more

Earth, Life and Social Sciences

Ir. Raymond Creusen


Ir. Raymond Creusen


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