UV Photolysis for Ultrapure Water Systems
Ultrapure water (UPW) is required wherever even trace amounts of contamination can impact product quality, process stability or equipment performance. Industries such as microelectronics, pharmaceutical manufacturing, power generation and advanced materials production depend on water quality levels far beyond conventional drinking or industrial water standards.
Producing ultrapure water requires the removal of dissolved salts, particles, microorganisms, gases and organic compounds. Among these parameters, Total Organic Carbon (TOC) is often one of the most challenging to control.
UV Solutions in Water Treatment
The Importance of TOC Control
Organic contaminants may originate from:
- Source water
- Distribution systems
- Storage tanks
- Process equipment
- Resin degradation products
Even very low concentrations can affect sensitive manufacturing processes and lead to yield losses or product defects.
As purity requirements continue to increase, many facilities target TOC levels in the low parts-per-billion range.
UV Photolysis as a Key UPW Technology
UV photolysis has become a standard technology in modern ultrapure water systems. UV radiation at 185 nm generates highly reactive species that oxidize dissolved organic compounds.
The oxidation process converts complex molecules into carbon dioxide, which can subsequently be removed from the water stream.
UV photolysis provides:
- Continuous TOC reduction
- Chemical-free operation
- Low maintenance requirements
- Reliable performance
- Compatibility with existing UPW systems
Integration into Water Treatment Trains
UV photolysis is typically combined with technologies such as:
- Reverse osmosis
- Electrodeionization
- Ion exchange
- Ultrafiltration
- Degasification
By acting as a polishing step, UV systems help maintain consistent water quality throughout production operations.
Reliable Water Quality for Critical Processes
Whether used in semiconductor fabrication, pharmaceutical production or advanced industrial manufacturing, UV photolysis supports the delivery of ultrapure water that meets the highest quality requirements.
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