Process water

In most cases demineralised water is produced by using a reverse osmosis installation or an ion exchanger.

Hardness in water is caused by certain salts. The major hardening ions are calcium (Ca²+), magnesium (Mg²+) and bicarbonate (HCO3-).

Filters are used to separate floating substances from water. There is a large diversity of filters. Therefore, it is necessary to adequately define the situation in advance before choosing a filter type.

Due to limitations on pumping water, in certain cases it is more interesting to purify river- or canalwater into process water.


In many cases rainwater is a good alternative for tap or spring water. This rainwater must usually be treated before it can be used in production processes.

die cleaning system

During aluminum extrusion, the dies are polluted with aluminum. It is important to clean the dies in a safe and ergonomic way.

There are different ways to disinfect water. The best known are UV-, ozone- and dosing treatments.

In the carbon steel galvanisation process it is important for the flux bath to contain a constant low iron (Fe) concentration. To achieve this a flux de-ironing installation is the most appropriate technique.


iron removal installation at Barry Callebaut, PCA water

Iron-rich groundwater caused problems during the production process at Barry Callebaut...

process water treatment Citrique

Citrique switches from groundwater to surface water with...