May 27, 2020

UV radiation for air and surfaces disinfection. Application Experience

Just yesterday, the bactericidal ultraviolet radiation technology for air and surfaces disinfection (UV radiation) was irrelevant for most of BL GROUP’s audience. However, today our subscribers are literally plying us with a bunch of questions. They are interested in everything: production technologies, and the effectiveness of UV irradiators, and the usefulness of UV robots, and operating rules from a safety point of view.

We have prepared answers to the most frequently asked questions. Let us begin with basic technology information.

The whole “UV radiation for air and surfaces disinfection” thing is based on fundamental concepts of molecular biology, photochemistry and lighting engineering. An object that is exposed to UV radiation in the bactericidal part of the spectrum (200-300 nm) is extremely small. The average size of the bacteria is 0.001-0.005 mm, and COVID-19 is about 10 times smaller. Like any type of disinfection, UV radiation requires caution in practical use, but the achieved result in the fight against pathogenic microorganisms significantly exceeds the associated difficulties and relatively modest costs.

Is there any positive experience with UV radiation against various infections?

The effectiveness of this technology in the fight against various infections has been proven in numerous experiments conducted in the last third of the previous century. Their results are described in detail in scientific articles. Let us review the two most successful and striking examples.

UV radiation against tuberculosis

In this one conditions of tuberculosis transmitting through airborne droplets were simulated. As is known, a mycobacterium of Koch bacillus infects not only humans but also animals. From a hospital ward with tuberculosis patients, air was supplied to two isolated boxes with guinea pigs. In the first box, air was released after a session of UV irradiation in this hospital room, and in the second, without prior UV disinfection. In the first case, the animals remained healthy, and in the second, they became ill. The same result was repeated many times.

UV disinfection in an operating room

Despite the traditional disinfection measures in an operating room of one of the hospitals, postoperative infection was recorded for a long time in 10% of patients. In order to increase the level of cleanliness and hygiene, the hospital personnel tried UV radiation. As a result, the indicator decreased to 0.5%, meaning there were 20 times fewer cases of postoperative infection.

Can UV radiation be used not only in medical institutions?

Of course. BL GROUP’s experts have initially tried to establish the developed UV equipment (UV irradiators and UV robots) as solutions for various facilities and areas — in public gathering places. Moreover, we are not alone in attraction world’s attention to the importance of the widespread use of UV radiation! The International Commission on Lighting (CIE) on May 12, 2020 issued an official statement on the use of UV radiation to reduce the risk of transmission of COVID-19. For more details read this news article.

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