UV Water Disinfection Systems

Ultraviolet Water
Disinfection Systems
© 2016 www.WaterProfessionals.com

• Ultraviolet (UV) water disinfection systems
utilize light in the 200-300 nanometer
range to disinfect water.
• Most modern UV water disinfection
systems operate at 254 nanometers.
UV Water Disinfection

How It Works Part I
• Exposure to UV light between 200 and
300 nanometers alters the DNA of
bacteria and microorganisms.
• Bacteria and microorganisms become
unable to reproduce or infect other
organisms.

How It Works Part II
• DNA and RNA molecules absorb the UV
light and dimers form along DNA strands.
• The dimers disrupt the RNA nucleic
material, preventing cellular replication.

Required Conditions
• For ultraviolet water disinfection systems
to be effective, water must be “essentially”
free of the following:
• Turbidity
• Silt
• Color
• Iron
• Manganese
• Organic Matter
• UV water disinfection will not succeed if
anything shields the microorganism from
exposure to the UV light.

Required UV Dosage
• UV dosage must be sufficient to inhibit the
DNA of the microorganism.

Class A Disinfection
• The ANSI and NSF require a UV dosage
of 38 mWs/cm2 at 254 nanometers for
Class A POU and POE disinfection:
• 38mWs/cm2 = 38 milliwatt seconds per
square centimeter
• Class A POU = Point of Use
• Class A POE = Point of Entry

Equipment Setup
• Water flowing through high purity glass
tubes is exposed to UV light at 254 nm.
• The size of the UV light used is based on
flow rate and the required length of
exposure for disinfection.

Benefits of UV Disinfection
• Benefits of disinfecting water with an
ultraviolet disinfection system include:
 No Byproducts
 No Hazardous Chemicals
 Environmentally Friendly
 Effective Microorganism Control
 High Flow Rate Disinfection
 No Impact on Chemical Makeup
 No Impact on pH Levels
 Low Maintenance

Custom Ultraviolet
Water Disinfection Systems
Call: 800-999-4195
Email: info@waterprofessionals.com

UV Water Disinfection Systems

UV Water Disinfection Systems

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UV Water Disinfection Systems