Water treatment

The complexity of the treatment required for the production of drinking water depends strongly upon the quality of its raw water, and therefore upon its origin (aquifer, groundwater, spring well, surface, brackish or sea water), but also upon the degree of exposure of these waters to potential pollutants.

About a third of the drinking water supplied in Switzerland does not require any treatment, another third is treated in a single stage (chlorine disinfection, UV irradiation, filtration), whereas the last third needs to be processed in a multi-stage chain including some of the following unitary treatments: coagulation, sedimentation, filtration, oxidation and adsorption.

During the past ten years, membrane technologies have imposed themselves as an attractive alternative for the replacement of one or several of these unitary treatments, offering additional advantages such as better performances, compactness and lower operation costs (energy and chemicals consumption). Replacement costs and the risk of irreversible membrane blocking have initially slowed down the penetration of membranes in the municipal drinking water market.

These obstacles have now been overcome and membrane technologies (ultrafiltration for the treatment of freshwater, reverse osmosis for softening and desalination) are now contributing to meeting the growing drinking water needs of the world population.

Membratec SA
Ecoparc de Daval C 1
CH - 3960 Sierre

Tél.+41 (0)27 456 86 30

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