Sterilization Effect Of Hospital Ultraviolet Sterilizer

The sterilization effect is determined by the radiation dose received by the microorganisms. At the same time, it is also affected by the output energy of ultraviolet rays, which is related to the type of lamp, light intensity and use time. As the lamp ages, it will lose 30%-50% of its intensity . Ultraviolet radiation dose refers to the amount of ultraviolet light of a specific wavelength that is required to achieve a certain bacterial inactivation rate: radiation dose (J/m2) = radiation time (s) × UVC intensity (W/m2) The larger the radiation dose, the greater the disinfection efficiency Due to the equipment size requirements, the general irradiation time is only a few seconds. Therefore, the UVC output intensity of the lamp tube becomes the most important parameter to measure the performance of the ultraviolet light onclick="g('disinfection equipment');">the disinfection equipment. In the disinfection of urban sewage, the average radiation dose is generally above 300 J/m2. Below this value, the phenomenon of light resurrection may occur, that is, the germs cannot be completely killed. When they flow out of the channel and receive visible light, they will be revived, reducing the sterilization effect. The higher the requirement for sterilization efficiency, the greater the radiation dose required. The main factor that affects the microbes receiving sufficient UV radiation dose is the light transmittance (at 254 nm). When the UVC output intensity and irradiation time are constant, the change in light transmittance will cause the actual dose of the microorganisms to change.