Goodbye Brine? A New Era in Water Treatment

A Swiss firm’s zero-brine system is challenging old water treatment rules and drawing serious interest from EU utilities

17 May 2025

A Swiss water technology group is seeking to challenge Europe’s reliance on conventional softeners with a salt-free system that it says reduces waste and energy use, as utilities come under pressure to meet stricter environmental standards.

Evodrop, based in Switzerland, has developed EVOdescale, a scale prevention system that operates without salt, backflushing or brine discharge. Unlike traditional softeners, which remove minerals from water, the company says its system inhibits scale formation while leaving mineral content unchanged.

The approach comes as European regulators tighten limits on chemical waste and promote circular economy policies. Conventional softening systems can generate saline wastewater and emissions that utilities must manage under increasingly strict rules.

Evodrop says pilot projects with Stadtwerke München and Berliner Wasserbetriebe have reduced membrane cleaning frequency by half and extended equipment lifespans. The company argues that lower maintenance needs translate into cost savings and reduced carbon emissions.

According to Evodrop’s internal lifecycle analysis, the system can cut emissions by up to 98 per cent compared with traditional salt-based processes, largely by eliminating brine discharge and associated energy use. The figures have not been independently verified.

Water treatment groups across Europe are adjusting their product lines in response to sustainability targets. Veolia and other large operators have expanded green chemistry offerings, while Aqua Membranes has introduced new reverse osmosis components and partnerships during 2025.

“Utilities want simplicity, reliability, and sustainability, all in one system,” said a senior water consultancy analyst. “EVOdescale hits that sweet spot. It is a small change with a big ripple effect.”

Industry specialists caution that long-term performance data for newer chemical-free systems remain limited and that results can vary depending on local water composition. Adoption may therefore depend on further operational evidence.

With climate targets tightening and regulatory scrutiny increasing, utilities are reassessing treatment technologies that reduce waste streams and energy consumption. Whether salt-free systems can displace established softening methods at scale will depend on performance data and regulatory alignment in the coming years.