UV Disinfection of Air

How Does Ultraviolet Work?
Ultraviolet energy causes permanent inactivation of microorganisms by disrupting DNA so that they are no longer able to maintain metabolism or reproduce. The maximum effectiveness occurs at between 240nm and 280nm, with the most effective wavelength typically at 254nm. The Sukrut UV Spektrotherm high-intensity Lamp produces this wavelength at a greater level than any other UV lamp.

Moving Air Applications
Increasingly strict standards for product quality and personal safety are not always met by air filtration alone. More and more companies and public sector employers are choosing to use UV in conjunction with, or instead of, sterile filters in air ducts. Prime application areas include: Air to aseptic and sensitive areas for the food, beverage, pharmaceutical and electronics industries

  • Air to clean rooms and laboratories in all scientific establishments
  • Air to hospitals and clinics
  • Disinfection of air in ventilation ducts in all types of buildings, often for prevention of “sick building syndrome”
  • Protection of staff and visitors against Legionella in public buildings

Humidified Air – An Additional Risk
If it is necessary to humidify ducted air, the method of choice is a spray humidifier within the ventilation system. However, water is another potential source of infection, particularly when dispersed in an aerosol. Extra protection against this source of infection is achieved by UV treatment of the water prior to its entry into the sprayer. For details of Sukrut’s cost effective in-line systems, please contact a Sukrut UVspecialist who will be pleased to advise and assist you.

Static Air Applications
Static, or slow-moving air is most effectively treated by a Sukrut UV unit mounted on the ceiling or inside the top of a tank. Key areas for UV treatment of static air include:

  • Tank head space in the food, beverage and pharmaceutical industries
  • Filling machines for sensitive products
  • Clean rooms and beverage filling rooms

Sugar Disinfection System
Micro-organisms and spores can be drawn into the storage tank through air or in the concentrated sugar syrup. At high sugar concentrations these organisms remain dormant. However, condensation forming in the tank head space will produce ‘pools’ of dilute sugar solution on the syrup surface. These provide an ideal growth site for microorganisms. Continuous UV treatment of the tank head space prevents this potential source of spoilage organisms.

Installation and dose. Deciding factors include:

  • Dimensions of Ducting or Tanks
  • Maximum distance
  • Material reflectance
  • Air velocity
  • Relative Humidity
  • Air quality (suspended particles)
  • Type and concentration of organisms
  • Re-circulation to fresh air ratio

The Sukrut UV Air Treatment Range:

  • Ventilation ducts and Moving Air applications
  • Static Air i.e. Tank head space, slow moving air

All Sukrut UV Air Disinfection Systems Include:

  • No moving parts to maintain
  • Standard / Spektrotherm Lamps sized for each application
  • Control and Power Supply module
  • Connection cable