U-PUR™

To face increasing UPW requirements, Ovivo by Ecolab has created the innovative U‑PUR solution – a metal-free reactor that combines multiple polishing steps to remove TOC and hydrogen peroxide traces. The U‑PUR design is a maintenance-friendly solution that eliminates piping, reducing the risk of contamination from metal exposure.

In addition, the standalone design allows increased flexibility in implementation as well as global project execution and reduced project lead-time. The U‑PUR provides numerous benefits over conventional UPW polishing systems, including:

• Compact design
• Low pressure drop thanks to the simplified process (less piping, less friction)
• Optimized power consumption for energy efficiency
• Optimized CAPEX and OPEX

The three steps involved in the U‑PUR process are:

1. Polishing UV radiation. The UV-radiation units (LP-Hg Lamp 185 & 254 nm) are installed to oxidize the remaining organic compounds (TOC) to carboxylic acids and carbon dioxide, which can be better removed by the following process stages. The UV reactor, made of high purity quartz, integrates a self-reflective coating for 254nm light.
2. Polishing Mixed Bed. Within the ultrapure-grade polishing mixed bed ion exchange resins, the last traces of ions but also of acids and carbon dioxide generated by the UV oxidation of TOC are removed. The use of our premium quality resins (OvivUP – M020) allows us to achieve < 1ppb TOC.
3. Catalyst. Special ion exchange resin (CatOX – 8020) is used for degradation of hydrogen peroxide traces (H2O2), produced by photolysis reaction in order to achieve up to < 1ppb H2O2.

With an ultimate capacity up to 50 m3/h (220 gpm), the U-PUR metal-free reactor is a highly compact solution.