How does UV light work?

UV light is an efficient and well-documented method of disinfection. It is possible to neutralize the majority of types of microorganisms such as bacteria, fungi, yeast and viruses.

UV light operation

UVC treatment is an efficient disinfectant form to use in air, liquids and surfaces. When the UVC light reaches the microorganisms and penetrate the cell, the DNA in the cells is destroyed and it prevents the cell’s ability to reproduce. This prevents the cell from multiplying into an infection in a host.

The best wavelength to ensure maximum effect of disinfection is about 264 nm.

Works under all conditions

UVC radiation of the microorganisms is completely indepenent of pH, temperaure or whether they are in solid, liquid or airborne form. The most important thing is that the light can hit the organism and if the bacteria is hidden from the light, it can avoid irradiation.

The UV light can be used as the only disinfectant solution, but also works very well as a supplement to other techniques.

Our UV systems can be installed in all types of environments and are used in a wide range of applications within both industry and agriculture.

We are happy to help

Do you have a need for disinfection, but have not the solution yet, please call +45 22680680 or send an email to us

We are always ready to find a solution to your specific needs and wishes.

Bacteria, viruses and fungi

Here you will find a selection of the dose needed to neutralize the organisms by 90-99,99%.

Microorganisms UV light dose J/m2 to achieve 90% reduction Microorganisms UV light dose J/m2 to achieve 90% reduction
Bacillus anthracis – Anthrax 45.2 Vibrio comma – Cholera 33.75
Clostridium tetani 130.0 Mucor racemosus A 170.0
Corynebacterium diphtheriae 33.7 Penicillium roqueforti 130.0
Ebertelia typhosa 21.4 Chlorella Vulgaris 130.0
Escherichia coli 30.0 Paramecium 110.0
Listeria Monocytes 45,0 Bacteriophage – E. Coli 26.0
MRSA 32.0 Infectious Hepatitis 58.0
Mycobacterium tuberculosis 62.0 Influenza 34.0
Pseudomonas aeruginosa 55.0 Brewers yeast 33.0
Pseudomonas fluorescens 35.0 Common yeast cake 60.0
Salmonella enteritidis 40.0 Saccharomyces spores 80.0
Salmonella typhimurium 80.0 Streptococcus viridans 20.0

Inactivation of microorganisms with UV light is an exponential process. The higher the UV light exposure (dose), the higher the proportion of microorganisms is inactivated:
UV light exposure (dose) required to inactivate 99% is twice the value to inactivate 90%.
UV light exposure (dose) required to inactivate 99,9% is 3 times the value to inactivate 90%.
UV light exposure (dose) required to inactivate 99,99% is 4 times the value to inactivate 90%.

Contact us to get the exact dose at exactly what you want.

Ultraviolet Lighting

UV radiation belongs in the  category of electromagnetic radiation. Other well-known types are X-ray, light, radio and television radiation. The only difference between these types of electromagnetic radiation types is the length of the radio waves. The shortest wavelength belongs to cosmic and x-ray radiation. Very long wavelength is associated with alternating signals. Optical irradiation is a very small sector. One of them is UV irradiation. Visible and infrared radiation are examples of long wavelengths in this spectrum.

Ultraviolet is the part of electromagnetic radiation bounded by the shorter wavelength of visible spectrum and the upper end of X-rays. The spectrum of ultraviolet radiation is defined between 100 and 400 nm and is visible to the human eye.

Using the CIE classification, UV spectrum is divided into three types:

  • UVA (long wave radiation) from 315 nm to 400 nm
    UVB (medium wave radiation) from 280 nm to 315 nm
    UVC (short wave radiation) from 100 nm to 280 nm

A strong bactericidal effect is in the short wave radiation UVC. The UV radiation from a source is expressed in watts (W) and the irradiation density is expressed in watts per square meter (W / m²). To ensure bactericidal effect, dose is important. The dose is irradiation density multiplied by time (t) in seconds and expressed in joules per square meter (J / m²). 1 joule is 1 watt-second.

Why use UVC as disinfection?

UVC irradiation is an effective way to disinfect water, air and surfaces without adding or creating toxic effects. It is a natural principle and the sun’s radiation is an important factor in keeping the environment clean. Dose and efficiciancy of artificial UVC irradiation has been greatly increased in relation to the sun’s irradiation, but provides an environmentally friendly solution to a disinfection need.

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