Disinfection mechanism with ultraviolet rays:
UV device is the most powerful and effective device used to destroy viruses, bacteria, fungi and hospital infection control. Unlike most disinfectants, UV radiation does not inactivate microorganisms by chemical interaction, but by absorbing light by themselves, which causes a photochemical reaction. The said radiation changes the molecular material necessary for the cellular agent. Because UV rayspenetrate the cell wall of microorganisms, nucleic acids and other vital cellular materials are affected by that effect. As a result, the cells that are exposed to this radiation are damaged or destroyed. There is enough evidence that if enough UV energy is irradiated to organisms, UV rays can disinfect water as much as needed. To destroy small microorganisms such as bacteria and viruses, some UV radiation is required, but to destroy and inactivate protozoa such as Giardia and Cryptosporidium,uv energyis required, several times the energy required to inactivate bacteria and viruses. As a result, the hospital UV sterilizer is effective for disinfection or for groundwater that does not contain Giardia and Cryptosporidium.
UV device for environment disinfection:
- UV rays are not a sterilizing agent and can be used as a disinfectant.
- UV cannot penetrate through glass and some plastics.
- Before using the UV lamp for disinfection, you must wash the environment completely.
- Before using the UV lamp for disinfection, the windows and glasses should be darkened because the effect of killing bacteria is reduced with the presence of light.
- During the operation of the UV device, all air vents must be closed to disinfect the environment.
The wavelength range of the UV device for disinfection:
The wave energy of UV rays is in the wavelength range of electromagnetic radiation (100-400 nm) between X-rays and the visible light spectrum. The optimal region for germicide by UV rays is in the range of 245-285 nm. Disinfection by UV rays, also by means of low pressure lamps whose maximum energy output is in the wavelength of 7. 253 and it is done with medium pressure lamps whose energy is in the wavelength of 180-370 nm or lamps whose energy is emitted in other wavelengths with high fluctuating intensities. The amount of radiation produced by each 30-watt lamp with a luminous flux of 1900 lumens is suitable for destroying microorganisms in a room with an area of 6 square meters and a height of 3 meters.
Selling a UV device to disinfect the environment
Cases used in the method of disinfecting and disinfecting surfaces with UV rays:
There are three main uses of UV disinfection:
- Liquid disinfection
- Disinfection of spaces
- Disinfection of surfaces
Disinfection of liquids with a hospital UV sterilizer:
Disinfection method with UV lamp can be used for drinking water, process water and wastewater, i.e. all cases where water without pollution or with reduced pollution is desired. Today, chlorination is used more than any other method to disinfect water, but unfortunately, chlorine creates “haloforms” such as chloroform, which are known to be carcinogenic. This caused the researchers to seriously try to replace or limit the use of this chemical. The only method known today that does not change the chemical and physical properties of water and does not add any substance to water is disinfection with ultraviolet rays.
Uses oflightmed uv rays (negatoscope) for liquid disinfection:
- Food industry
- Process waters and drinking water
- Breeding fish, shrimp, livestock and poultry
- Municipal and industrial wastewater
- Cosmetics, chemical, pharmaceutical and electronics industries (super clean water)
- Swimming pools, water features and jacuzzis
- Closed circuit cooling water systems and air conditioning systems
Disinfection device for hospital and clinic surfaces:
Disinfection of space and surfaces after water disinfection is one of the most important and successful uses of ultraviolet rays. While air disinfection is hardly possible or impractical with conventional disinfectiondevices, ultraviolet rays are used as an effective means to destroy airborne microorganisms. In this method, all the air in the space passes through the vicinity of the lamps with the help of natural flow, and the microbial density in the space is reduced to a great extent. In this way, the transmission of diseases and infections that spread through breathing is prevented.
Application of UVrays for disinfection of operating room, clinics:
- Hospitals (operating room, waiting room, wards and laundries)
- Pharmacy, laboratories and kitchens
- Food industries, slaughterhouses, dairy industries, livestock and poultry breeding, dry fruit production
- air conditioning
Applications of UV raysfor disinfecting the surfaces of objects in the operating room and clinic:
- Disinfection of closed materials in the food industry such as foil, cans and bottles
- Preventing material contamination in the production and packaging process
- Tanks, containers and bottles as well as filling machines
Factors affecting the efficiency of disinfection by UV rays:
Unlike many disinfectants, UV radiationis a physical process that depends on contact time to inactivate pathogens. To achieve inactivation, it must be absorbed by the microorganism, so any factor that prevents UV rays from reaching the microorganism will reduce the disinfectioneffect. reported that pH does not affect the disinfection effect by UV rays, the factors that affect the disinfection efficiency of the device are:
- Chemical films and dissolved organic and inorganic substances:
The deposition of solids on the surface of the UV lamp can reduce the intensity of the radiation, thus reducing the disinfection efficiency.
- In addition, the formed films are caused by the impact of organic substances, magnesium, calcium and iron deposits, which have been reported. Water that has a high concentration of iron, hardness, hydrogen sulfide and organic matter is very prone to sediment formation, which gradually reduces the effectiveness of UV rays. A variety of chemicals can reduce permeability, including humic acids, phenolic substances, and lignin sulfonates, chromium, cobalt, copper, and nickel. Also, color factors such as tea and plant leaf extracts reduce UV intensity.
- The community of microorganisms and turbidity: the surface of the particles is the breeding and storage place for bacteria and other pathogenic bacteria. Therefore, the presence of zinc particles is effective in disinfection because it removes bacteria from The UV rayprotects and disperses the UV light, it is effective, however, high turbidity affects the disinfection. Like the particles that cause turbidity, the community of microorganisms can also affect the efficiency of disinfection, and that is because it causes them to be practically sheltered, replaced by pathogenic kettles.
Benefits of using a hospital UV sterilizer:
- Effective removal of microbialcontamination without chemical contamination
- Instant disinfection without the need for a contact tank
- Effective disinfection of microorganisms resistant to chlorine and ozone
- Not creating harmful and pathogenic chemical side compounds
- No chemical taste or smell
- No change in physical and chemical quality
- No immediate side effects and sensitivity
- No destruction of the environment
The environmental impact of using ultraviolet rays:
Because UV radiationis not a chemical agent, it does not produce any toxic residues, but certain chemical compounds may be altered by UV radiation. It is generally believed that these compounds break down in a more harmless way, but more research is still needed in this field. Currently, it should be believed that UV disinfectiondoes not have any favorable or unfavorable environmental effects.Is the use of UV lamps harmful to the body?