The use of UV technology for water and wastewater disinfection is a well-recognized and accepted technology. Medium pressure UV is a likely choice wherever chemical disinfection would be problematic or prohibited.

Typical UV dose levels range from 30 mJ/cm2 for basic disinfection, to over 100 mJ/cm2 for wastewater reuse such as irrigation. Due to the sensitive nature of the application, equipment and process reliability are of utmost importance.

The term medium pressure UV refers to the mercury vapor pressure inside the UV lamp when operating. UV energy from a medium pressure UV lamp is emitted over all wavelengths from 175 to 300 nm, depending on system design.

The broad energy spectrum allows medium pressure UV systems to efficiently disinfect wastewater and reduce residual organics (TOC), with significantly fewer lamps than conventional low pressure or low pressure/high output UV systems.

The advantages of Ozonia's medium pressure mercury vapor UV lamp systems include:

• Higher energy density
• Stronger output below 300 nm
• Higher UVC (200-280 nm) efficiency - greater than 18 percent
• Variable lamp power available for those applications where the power needs to be adjusted
• Longer guaranteed lamp life using fewer lamps
• Ability to treat higher flowrates using a small footprint
• Highly efficient for disinfection, ozone destruction, TOC reduction, catalytic oxidation, etc.

Ozonia's closed-chamber design is ideally suited for both low head and high-pressure effluents, such as from a pressure filter. Available in a variety of configurations, the most popular systems use single or multiple 3.0 or 6.0 kW lamps.

Ozonia UV systems are available in a variety of configurations from basic keypad interface with programmable relay for simple on/off operation, to sophisticated Allen-Bradley® PLC's with a touch-screen operator interface for numerous logic and control functions such as variable output, data logging and SCADA communication capability.

All Ozonia UV reactors are made of 316L stainless steel construction throughout with a variety of surface finishes, inlet/outlet connections and pressure ratings, consistent with the application.