Disinfection of tableware is the process of using high-temperature steam to kill pathogens on the surface of tableware. Common methods include boiling disinfection, steam disinfection, oven disinfection, and soaking disinfection. Tableware such as bowls, chopsticks, plates, and spoons are daily necessities for family life. A large number of survey data show that various pathogenic microorganisms can often be detected from these tableware. If in daily life, thorough cleaning and disinfection are not often carried out, then these tableware may cause food poisoning. Therefore, the daily disinfection of tableware commonly used in the family will help ensure the safety of the whole family.
Ultraviolet disinfection is the use of appropriate wavelengths of ultraviolet rays to destroy the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in microbial cells, causing growth cell death and (or) regenerative cell death, achieving sterilization effect. Ultraviolet disinfection technology is based on modern epidemic prevention, medicine, and photodynamics. It uses specially designed high-efficiency, high-intensity and long-life UVC band ultraviolet light to irradiate flowing water to remove various bacteria, viruses, parasites, algae and algae in the water. Other pathogens are killed directly.
Ultraviolet germicidal lamp:
Only artificial mercury (alloy) light source can output sufficient UVC intensity for engineering disinfection. The tube of the ultraviolet germicidal lamp is made of quartz glass. The mercury lamp is divided into three types according to the mercury vapor pressure in the lamp tube after lighting and the difference of the ultraviolet output intensity: low pressure low intensity mercury lamp, medium pressure high intensity mercury Lamps and low-pressure high-intensity mercury lamps.
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.
Most UV devices use traditional low-pressure UV lamp technology, and some large water plants use low-pressure high-intensity UV lamp systems and medium-pressure high-intensity UV lamp systems. The high-intensity UV may reduce the number of tubes by more than 90%, thus The footprint is reduced, installation and maintenance costs are saved, and the ultraviolet disinfection method is also suitable for effluent with poor water quality.
Recommend a UV sensor used in the UV disinfection lamp for tableware and food disinfection. The UV sensor introduced from abroad-GUVC-T10GD-L, is a product with a large photosensitive area and the main detection wavelength range is 254nm. The sensor is packaged in a TO-46 metal casing. The area of the photosensitive chip is 1.536mm². The output of the ultraviolet sensor is mainly related to the response, the sensor's photosensitive area and the light intensity, so products with a large photosensitive area can detect weak ultraviolet radiation. Mainly used in close-range flame monitoring (under dark environment) and disinfection equipment.
