Let’s say you want to talk to someone a little longer on the street. In times of corona, this can be a dangerous activity. Unless you are standing in the hot sun, which purifies the air from almost all Coronaviruses with their radiation. Of course, with a specified minimum distance of one and a half meters. For example, there are more solutions from tech companies that can make spaces free of corona.
Dl (Previously Philips Lighting) built a filtration system in overhead air fixtures. In retail locations, for example, this system can disable 99.99 percent of SARS-COV-2 in the air within 10 minutes. German company ScreenSource GmbH reported positive test results with them this week Aerodoctor.
UV rays are the basis of all these applications to purify indoor air. This can also fight pathogens other than corona. UV-C rays break down the DNA or RNA of the microorganisms and make them harmless.
UV-C disinfection lamps for upper air can actually be found at various locations in Europe. For example, in a number of Edeka supermarkets in Germany, in DM pharmacy stores in Slovakia and at Rugby Union Club Harlequins in the United Kingdom. The system purifies the air as it circulates around the room. It works even when people are present.
These and other filtration systems could be a solution to sectors such as the hospitality industry, gyms and theaters. Because, according to researcher Bert Blocken of Eindhoven University of Technology (TU / e), a study he conducted showed that the combination of ventilation and innovative air cleaning can be a good precaution for safe and responsible sports, even during the Corona pandemic. . His research has been published in the scientific journal Construction and the environment.
Air quality or clean air is closely related to the concentration of aerosol particles, which are the tiny droplets of saliva that float in the air. TU / e research shows, among other things, that ventilation alone is usually not sufficient. Additional air cleaning is required to keep the concentration of aerosol particles, for example, in indoor sports facilities consistently low.
Cleaning with plasma technology using activated carbon and electrostatic filters has proven to be very effective. Together with the ventilation system, they remove 80 to 90 percent of the aerosols from the air. According to him, follow-up research should clarify whether this combination of air purification and ventilation is also showing the same results with other technologies and in other environments, such as nursing homes, schools, indoor (sports) playgrounds, offices and restaurants, theaters, elevators, etc.
‘Symbol of hope’
Artist and designer Daan Roosegaarde has created a completely different method for creating a safe environment against corona with the help of UV rays. In collaboration with his team of designers, he developedUrban SunAs a symbol of hope, a large circle of distant UV rays shines with 222-nanometer light in public places to clean up those areas from the Coronavirus. It serves as an additional protection in addition to current government regulations. “Urban Sun wants to give hope,” Studio Roosegaarde said in a press release.
“It combats the negative impact of social isolation by striving to improve cultural gatherings, sporting events, public squares and school grounds.”
The first Urban Sun was launched on Tuesday next to the Erasmus Bridge, Rotterdam’s most famous landmark. The project started as a premiere of a movie at StudioRoosegaarde.net with potential exhibitions in the future.
One of the conditions for reopening schools in the Netherlands is one Good ventilation. In practice, this often means opening windows and doors widely. If you combine this procedure with a UV-C-based filtration system, the risk of infection can be reduced by up to 73 percent. This emerged from a practical scientific test with the German Airodoctor air cleaning system in South Korea. In a classroom of 25 students, window ventilation reduced the risk of infection by 55 percent. When using AiroDoctor with windows closed, the risk is reduced by more than 50 percent. The device performed better when placed in the center of the room.
Also interesting: UV-C is a “powerful tool” in the fight against Coronavirus