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|
|Listeria Monocytes||45,0||Bacteriophage – E. Coli||26.0|
|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.
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.