The concern about the current health crisis caused by Covid-19 has generated a boom in the demand for disinfectants by air, nebulizers. Air disinfection methods are recommended as long as they are carried out after prior cleaning and disinfection of the space. In this sense, our technical department highlights its effectiveness in deep cleaning of facilities.
As a hygiene supplement, Itram Hygiene recommends periodic, monthly or semi-annual disinfection of spaces with nebulizers for disinfection of environments. Nebulizers are important in disinfecting environments, because they help decrease the microbial load in the environment as long as proper use is made.
Nebulizers for disinfection of environments. What they are and how they are used
Disinfection of surfaces by air (DSVA) is a method of disinfecting all surfaces (equipment, walls, ceilings and floors) of a room, nebulizing a disinfecting product in the air, keeping the room watertight during the process.
The conditions that must be met to be effective are not only determined by the chosen chemical solution. Fundamentally, there are two factors that make this process effective.
- The first of these is the size of the drop, it should be spread in drops between 5 and 10 μ.
- The second of these is the nozzle diffusion angle: between 60º and 85º degrees, always less than 90º.
This droplet size guarantees that we cover all the spaces and that we are not spraying. The diffusion angle guarantees that we reach the full volume of the room.
This is because the extent of nebulization is not due to the force with which the drop is projected, but to the Pascal principle of Fluid Dynamics, or in simpler terms, to the saturation of the volume by displacement. That is why we must carry out the nebulization for 4 minutes for every 100 m3, in this way we will ensure that the entire volume of the room is covered.
The biocidal efficacy of airborne disinfection is validated with a process according to the version of AFNOR NF T 72 281 of 2009. We will highlight that tests carried out with various devices and different compositions by Michel Thibaudon, aerial biologist at RNSA *, have shown that environmental disinfection causes an inhibition of mold spores.
Nebulization disinfection, the called «Terminal disinfection»
Likewise, we highlight that in numerous Cleaning and Disinfection Protocols of industries subject to GPM, in the Pharmaceutical sector the DVA Process is defined as: “terminal disinfection”.
* Réseau Nationale de Surveillance Aéreobiologuique
Consulted Authors J. Druilles and A. Chantefort. National Health Laboratory. Montpellier University.
– Arturo Breva, Technical specialist.