The STRO element is an open-channel RO element: a spiral wound structure with more membrane area, combined with a special open feed spacer that lowers flow resistance and concentration polarization. It is designed for high-salt and high-TSS wastewater where standard RO elements foul quickly, and it can replace equivalent Nanostone elements.
Key features
- High-strength design, up to 120 bar maximum operating pressure
- Open feed spacer with low flow resistance
- Spiral wound structure with more membrane area than disc tube modules
- High recovery with low energy cost
- Easy cleaning and maintenance, long membrane life


