➀ Ultra-low volume spraying method
The ultra-low volume spray method is to atomize the disinfectant into tiny particles below 20μm and spray evenly in the air so that the chemical disinfectant is in full contact with microbial particles in the air to kill microorganisms in the air: 3% hydrogen peroxide, 5000mg/L peroxyacetic acid or 500mg/L chlorine dioxide and other disinfectants will be configured and added to the ultra-low volume spray according to the dosage of 20-30mL/m3. sprayers. Close doors and windows, cover indoor corrosive instruments and equipment, such as monitors, displays, and other items, disinfection personnel to do a good job of personal protection, wear protective gloves, masks, antivirus masks if necessary, wear protective clothing; turn on the power for disinfection, according to first up, then down, first left, then right, from inside to outside, the first surface, then space, in a gradual order of uniform spraying; after the end of spraying personnel evacuation, close doors and windows, let disinfectants to give full play to the role of hydrogen peroxide, chlorine dioxide 30 ~ 60min, peroxyacetic acid for 1h; disinfection time up to open the doors and windows after thorough ventilation.
➁ Fumigation method
Fumigation is the use of chemical disinfectants with volatility in a certain space by heating or other methods to make it volatile. Close the windows and doors, and put the appropriate amount of 0.5% to 1.5% of the product into the air according to the instructions. The appropriate amount of 0.5%~1.0% (5000~10000mg/L) peroxyacetic acid aqueous solution (1g/m3) or chlorine dioxide 10-20mg/m3 into Corrosion-resistant, suitable size of the container, heating evaporation or adding activator. Or use 20mg/m3 ozone fumigation disinfection.Operation time, operation Follow the product instructions and open the windows and doors for thorough ventilation after disinfection. After disinfection, open doors, and windows for thorough ventilation.
Air purifiers are used for indoor UV air disinfection in occupied conditions and are increasingly used in medical institutions. The basic principle of air disinfectors is that the air entering the air disinfector is effectively killed and dust particles are filtered out by the elimination factors in the air disinfector. Currently, common elimination factors for air disinfectors include filtration, circulating air UV, electrostatic adsorption type, photocatalytic oxidation, and other physical technologies and chemical technologies such as ozone. There are differences in the effectiveness of different elimination factors: researchers measured the effect of silver, copper, and their oxidants on SARS virus killing at room temperature, and the results showed that silver and copper catalytic oxidation acted for 5 and 20 min respectively SARS virus was completely inactivated, indicating that catalytic oxidation is a potential method for air disinfection through air disinfection systems. The effects of ultrafiltration bacteria removal and electrostatic adsorption are influenced by the structure, characteristic properties, filter level, and pore size of the filter material. The effect of UV light on respiratory infectious disease pathogens The effect of UV on respiratory infectious agents has been described previously, and the effect of chemical agents such as ozone The effects of chemical reagents such as ozone will be described later and will not be repeated here. However, how to ensure that the elimination factors of the air disinfection The elimination factor of the air disinfector can work continuously to achieve effective killing of pathogens. and the effect of different elimination factors on respiratory pathogens. The disinfection effect of air disinfectors on respiratory pathogens needs to be further studied. And air disinfectors should obtain the health department’s sanitary permit for disinfection products. The air disinfectors should obtain health approvals from the health department for disinfection products and follow the instructions for use of disinfection products when using, servicing, and maintaining them. The instructions for use, maintenance, and repair of disinfection products should be followed. Close doors and windows when disinfecting, and the circulating air volume (m3 /h) of the disinfector should be greater than The air volume (m3 /h) of the disinfector should be more than 8 times the volume of the indoor room, and the air inlet and outlet should not be covered or blocked by objects. When cleaning the machine with a wet cloth, cut off the power supply first.