Salher improves its compact drinking water treatment plants with membrane technology: ultrafiltration

Salher designs and manufactures high efficiency ultrafiltration systems, for compact drinking water plants and as a pretreatment in reverse osmosis processes, complying with the R.D. 140/2003 regulations and the World Health Organization recommendations.

The vertical ultrafiltration modules Salher works with are made of high-strength PVDF hollow fibre membranes with an external-internal filtration system. The most significant advantages of the out-in flow design of these plants are the following:

• Higher range of tolerance to inlet water turbidity than in plants with inside-out filtration.
• Higher hydrodynamic resistance.
• Greater chemical tolerance.
• Less fouling, less clogging and therefore a constant operating pressure for a longer time.
• Larger flow area.
• Greater cleanability with lower reagent consumption.
• Longer life of the ultrafiltration modules, resulting in lower operating costs.

Another aspect that makes the Salher ultra-filtration system so safe is its cleaning system, based on a combination of selected cleaning reagents and a suitable cleaning protocol depending on the nature of the dirt. This has led to a longer durability of the membranes, less system downtime and, in short, less OPEX.