Disinfection

Chemical

Disinfectant agents such as chlorine dioxide, hypochlorite or ozone can be injected into the water.

The main advantage of using chlorine is the persistence of the treatment, so that the treated water retains its quality and safety throughout the distribution networks, all the way to the consumer’s tap.

Ultraviolet treatment

This involves using the bactericidal properties of the rays emitted by mercury vapour lamps.

Ultraviolet disinfection has a temporary rather than permanent disinfecting effect.

The treated water is not therefore protected against subsequent contamination.

Nonetheless, the main advantage of this process is that the desinfection agent dosing can be reduced and the taste and odour of the water is not barely
affected.

Other techniques

Membrane technologies offer new possibilities that can help to solve these problems. These consist of physically extracting the micropollutants instead
of chemically or biologically eliminating them.

They therefore dispense with the need to use chemical reagents, apart from for their maintenance, and do not leave any unpleasant taste or odour.

The techniques of ultrafiltration, nanofiltration and reverse osmosis offer responses to specific issues.

Reverse osmosis, in particular, is used to produce drinking water via the desalination of sea water.

Balteau’s engineers select the products and technologies best suited to each application.