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Disinfection and disinfection of air. We understand the ultraviolet germicidal irradiators
It's no secret that one of the ways in which infectious diseases spread is air.
The task of air disinfection can be solved by ultraviolet lamps, which emit a short ultraviolet with a peak of 253.7 nm. The word "feed" means a housing for germicidal lamps.
The design of ultraviolet bactericidal irradiators make it possible to divide them into two groups: open or closed irradiators - the so-called recirculators.
A specific feature of open-type bactericidal irradiators is that the flow of ultraviolet radiation from it spreads throughout the space where the light from the bactericidal lamp falls. This is the most effective way to disinfect both air and room surfaces, and even objects in a room.
In the recirculators, ultraviolet radiation has no output. The UV radiation is concentrated in a small confined space of the lamp. Air disinfection occurs as follows: the flow of non-disinfected air flows through the ventilation holes inside the case, inside the UV lamp disinfects the air in the confined space of the UV lamp, the disinfected air enters the room. This principle “UV radiation in the closed space of a bactericidal lamp” allows the use of UV recirculators for disinfecting air even in the presence of people.
In order to effectively disinfect the air and indoor surfaces, we advise you to use open and closed germicidal irradiators in common.
HOW DOES A BACTERICIDE TENSOR WORK?
Ultraviolet rays propagate in a straight line and act primarily on nucleic acids, exerting a harmful, pathogenic, and beneficial and productive effect on microorganisms. Bactericidal properties are only those rays that are absorbed, absorbed by the microcell protoplasm. At the biophysical level, ultraviolet radiation affects the genetic or functional machinery of bacteria: ultraviolet radiation causes damaging DNA damage, disrupts cellular respiration and DNA synthesis, which leads to the cessation of microbial cell proliferation. In this process for us as users of a bactericidal irradiator, the death of a microbial cell in the first or subsequent generations is the main one!
Interestingly, what is the power of ultraviolet penetration?
The ultraviolet penetration force is small. In order not to miss them, even a thin layer of glass is sufficient. The action of the rays is limited to the surface of the irradiated object: ultraviolet radiation is highly active, if microorganisms and dust particles are located in one layer, in a multi-layered arrangement we encounter a screening phenomenon: the upper layers protect the underlying layers.
Nature, fortunately (or unfortunately?), Is clever.
In any living cell, there are biochemical mechanisms capable of fully or partially restoring the original structure of the damaged DNA molecule. The protective membrane around the bacterial cell impedes the achievement of our goal: complete antimicrobial action. Despite the fact that we "kill" the microbes by UV radiation, there are still surviving microorganisms. They are able to form new colonies with less susceptibility to radiation. The resistance of microorganisms can be ranked as follows: viruses and gram-negative bacteria, gram-positive, fungi and protozoa microorganisms, the causative agent of tuberculosis, spore forms of bacteria and mold fungi. At the same time, the manifestations of the mechanisms of protection of the microbial cell from the lethal effects of UV rays, which are called photoreactivation, have been proven.
CAN THE REFINER REPLACE AIR CLEANER?
No filtering effect. For filtration, UV irradiators are included in the composition of ventilation systems with various cleaning filters.
IS IT POSSIBLE TO USE BACTERICIDE IRRADIATORS IN THE PRESENCE OF PEOPLE?
UV radiation when exposed to open skin and retina can cause I-II degree burns, exacerbation of cardiovascular diseases, and in some cases lead to cancer.
Open irradiators are intended for disinfection of premises only in the absence of people, open combined only during short-term stay of people, and closed in the presence of people.
Disinfection of surfaces, walls and floors of rooms can be carried out using open, combined, portable and mobile irradiators, only in the absence of people.
If a characteristic ozone odor is found, immediately remove people from the room and ventilate it thoroughly until the ozone odor disappears.
DO BACTERICIDAL IRRADIATORS EFFECT STERILIZATION?
What influences the effectiveness of the bactericidal action of UV radiation? Wavelength, radiation intensity, exposure time, the species of the microorganisms being treated, distance from the source and even the state of the air in the room: temperature, humidity, dust level, air velocity.
Bactericidal systems using continuous radiation lamps have low sterilization efficiency due to the difficulty of selecting the required radiation dose and insufficient power level. It is extremely difficult to have all the parameters so that you can simultaneously affect the entire spectrum of microorganisms and viruses.
The effectiveness of the use of UV radiation to disinfect air and surfaces in each case is calculated separately, taking into account all the parameters that affect the process of irradiation of microorganisms. To inactivate moving microflora in the air (according to research by American scientists), the dose of UVI should be 4 times greater than that used to inactivate microflora, which is fixedly located on surfaces. UV radiation is highly active, if microorganisms and dust particles are arranged in a single layer, with a multi-layered arrangement, the upper ones protect the underlying ones (screening phenomenon).
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