Ultraviolet or UV energy is the band of light just beyond the short wavelength end of the visible light spectrum. It is the range of light associated with the natural germicidal action of sunlight. UV works by affecting the DNA of microorganisms,eliminating their ability to reproduce or survive. All microorganisms can be disenfected by UV light without the concern of any organism's self-defense mechanisms. Ultraviolet energy is also very effective when used to break down many chemical species, eliminating them as contaminants in water. Ultraviolet light is the natural environmentally friendly alternative to chemical disinfection. Many common chemicals such as chlorine are hazardous to handle, remain in the environment for long periods, can form dangerous reaction by-products, and alter the products and processes in which they are used. Using UV elininates all fo these hazards by taking advantage of natural, safe light.

The Photon system from Aquionics UV:

A revolutionary microprocessor-driven control module offering:

• Full traceability
• Data Logging
• A menu-driven man-machine interface
• Displays of performance parameters
  

• The most economical systems for medium and large flow rates with the smallest footprint and easiest maintenance.
• Broad spectrum UV output providing complete disinfection and effective chemical destructiion.
• The only technology for extremes such as cold or hot water, poor water quality, or challenging control applications.
• The most advanced monitoring and controls for ac curate fluence measuremet, power control and procell integrity.
• The most advanced application knowledge to solve any of your specialized needs.

Aquionics PHOTON - cabinet

• Traceable
• Data logging - storage for up to 12 months
• Logging of system performance and alarms with date/time stamp
• Data download via RS232 to PC
• Optional palm top computer available
• Meaningful Monitoring
• Absolute germicidal UV specific monitor
• Calibrated, cetified and sealed device
• Display of UV instensity - % and mWcm2
• Process Flexibility
• Power level contral - automatically optimizes energy efficiency
• Display of water temperature
• Display of flow (from4-20mA input)
• On-line spares listing
  

System Status

• Real-time display of performance parameters
• Multi-level information access
• Absolute values shown in engineering units
• Telemetry outputs and latching alarm displays
• Hours run stored in permanent memory
  
  Language Options
  
  Multi-language display read-out, choose from English, French, Spanish, or German
  

Features Include:

• Microprosser control module provides on-board data logging
• Local/Remote Operation
• Membrane key pad for system controls
• Digital display screen
• Membrane key pad for system configuration

Markets and Applications

Increasingly stringent water standards for manufacturing processes encourage non-chemical water treatment. Aside from disinfection, UV is used to remove residual ozone to protect downstream equipment. Deozonation is accomplished by cleaving triatomic oxygen molecules with UV light (which converts ozone to oxygen). Dechlorination is achieved with special medium pressure lamps to protect chlorine sensitive RO membranes. UV can replace chemical dechlorination or activated carbon filter removal steps upstream of the RO equipment.

The City of Henderson, NV has purchased a 18 MGD system that will be installed in 2001 This will be the first surface water plant in the United States designed for Cryptosporidium inactivation with approval from the State and federal EPA. Over 99% of the Cryptosporidum oocyst will be inactivated with the AQUIONICS high intensity UV chambers.