• Drinkwater
    Drinking water

An innovative and unique water purification system. A milestone for the drinking water industry.


About PWN

PWN is a waterworks company in the Dutch province of North Holland. PWN’s drinking water network contains almost 800.000 connections and provides more than 1.7 million inhabitants with clean and safe drinking water. Total annual consumption is around 106 billion liters of drinking water.

In addition to the supply of drinking water, PWN is also active in the field of site management. Public areas, in this case the dunes of Noord-Holland, are extremely important for the production of drinking water. Reliable drinking water requires clean sources.

Our project

At the drinking water production location in Andijk, PWN treats more than 120.000 m3 of water from the IJsselmeer in order to produce high quality drinking water. The “old” pre-purification process dates from 1974 and needed to be replaced due to an increasing demand.

In addition, the removal of harmful material in drinking water plays an increasingly important role due to the increasing global pollution of surface water. The challenge for PWN is to produce high quality drinking water with lower environmental impact and lower energy consumption at lower costs.

Andijk III, the future of our water supply

A technology to produce high quality drinking water in a sustainable way

In order to guarantee a sustainable drinking water supply in the coming years, RWB has realized a unique purification technology on behalf of PWN. The SiX®-CeraMac® system is an innovative technology that is capable of turning polluted surface water into high-quality drinking water.

In Andijk, a reservoir and sieves provide the first removal of coarser particles from the water from the IJsselmeer. This is followed by newly developed steps with resin granules and ceramic membranes; SiX®-CeraMac®.

SiX® removes turbidity from the water (dissolved organic matter, nitrate and sulphate). SiX® also ensures that the ceramic membranes do not become soiled too quickly. The treatment by ceramic membranes is the next stage of the purification process. All particles larger than 1/10.000 millimeters are removed.

The treated water may still contain a quantity of hazardous substances, such as pesticides, viruses or medicines. Therefore, advanced oxidation is applied after the CeraMac® process, which uses a combination of UV and hydrogen peroxide to render these substances harmless.


What is realized?

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    Drinking water production plant with a capacity of 5.000 m³ per hour
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    Removal of suspended matter by means of a drum filter
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    Removal of organic compounds by means of the SIX® system (Suspended Ion eXchange)
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    Ultra-filtration by means of the CeraMac® system (filtration process based on ceramic membranes)
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    Post-treatment with UV treatment and activated carbon filtration

Our customer speaks

“What we do, is not just a little different, it is unique in the world. A milestone for the water industry. Andijk III not only ensures a high water quality, but also costs less energy and is better for the environment. The compact CeraMac® design in particular enhances the economic feasibility of the new water treatment process.”

PWN Drinking Water Company

“Global interest in SiX®-CeraMac® purification technology.”

Andijk III not only ensures a high water quality, but also costs less energy and is better for the environment.

The installation has a capacity of no less than 5.000 m3 per hour. This will ensure that the drinking water supply in North Holland can continue to be guaranteed in the coming years. The SiX®-CeraMac® purification technology is unique in the world. Europe, Australia, the United States and Singapore have expressed an interest in PWN’s innovations. PWN has also received two Innovation Awards from the International Water Association.

Also optimize your drinking water project?

More information about our activities within the drinking water sector? Feel free to contact us via the number below or use the contact form.