UV disinfection lamps are generally available in two types, with and without ozone function. Why is there such a difference?
This is because ozone is extremely oxidizing and can react with the double bonds of the lipids in the bacterial cell wall, altering cell permeability and causing their death with high efficiency.
The principle of an ordinary UV disinfection lamp is the direct UV-C irradiation of bacteria and viruses causing their death, which is a physical disinfection. UV-C, on the other hand, has a very short wavelength, so its penetrating power is weak and there are dead spots for disinfection in complex spaces. This is why some UV line disinfection lamps include an ozone function because ozone is a gas and it is difficult to have a dead spot, which makes up for this shortcoming of UV-C.
So why don’t all UV disinfection lamps have ozone capability, given that ozone can make up for the disinfection dead spots of ordinary UV disinfection lamps and the cost of producing ozone is not high?
This is because although ozone is antiseptic, it is also harmful to the human body and can irritate the human respiratory tract, possibly causing sore throats, chesty coughs, bronchitis, emphysema, etc.
The use of ozone disinfection must therefore be subject to the condition that the space is well-ventilated, allowing the ozone to disperse quickly after disinfection has been completed. The use of UV disinfection lamps with ozone is highly discouraged in poorly ventilated spaces.
So, is it better to have a UV disinfection lamp with ozone or without? In contrast, UV disinfection lamps with ozone are relatively better and more thorough, but they are also used under more stringent conditions. So the choice of UV disinfection lamp with or without ozone has to be determined by the actual usage scenario.