Care for the world with small drops

Efficient inactivation protects health

Regarding the harmless disposal of medical waste, we use a method of disinfectants and equipment

Efficient disinfection, disinfectant is the core

Since the outbreak of the epidemic, prevention and disinfection have become indispensable and important aspects of our daily lives and work. Many people have learned about disinfection knowledge through various means. So, do you know what are the commonly used disinfection methods? At present, the commonly used disinfection methods mainly include: thermal disinfection and sterilization (humid heat), ultraviolet disinfection, electric radiation sterilization and other physical disinfection, chemical drug disinfection and sterilization (plasma), which are described as follows:

Thermal disinfection and sterilization (wet heat)

Wet heat disinfection and sterilization are mainly carried out through saturated steam, boiling water, or circulating steam. Due to the high latent heat and strong penetration of steam, it is easy to cause protein denaturation or coagulation, so the efficiency of wet heat sterilization is higher than that of dry heat sterilization.

Pressure steam disinfection/sterilization:

Principle: The latent heat released during steam condensation and the negative pressure generated after condensation shrinkage accelerate the penetration of steam into the object, allowing the deep parts of the object to reach the temperature required for sterilization. Generally, most microorganisms can be eradicated within 30 minutes at 115 ℃, 20 minutes at 121 ℃, and 2 minutes at 132 ℃. The sterilization or disinfection effect depends not only on temperature and time, but also on the size of the packaging, placement, and type of sterilizer.

Disadvantages: Specific equipment is required and there are many precautions that can affect the disinfection effect, including effective elimination of air from the sterilizer during the sterilization process, proper packaging and placement of disinfection items, and attention to operational safety

Boiling disinfection:

Principle: Suitable for disinfecting tableware, food, cotton fabrics, metal and glass products. When the water temperature is ≥ 100 ℃, bacterial colonies die. Generally, disinfection can be achieved by boiling the water for 5-15 minutes. However, for spores with strong heat resistance, it takes several hours to kill. Therefore, general boiling can only have a disinfection effect and cannot achieve sterilization effect.

Disadvantage: Container is required, and disinfectant items are soaked, increasing the possibility of contamination after treatment.

Physical disinfection and sterilization

UV disinfection:

Principle: Ultraviolet radiation is a low-energy electromagnetic radiation. Microorganisms, after being effectively irradiated by ultraviolet radiation, are prone to mutations in their intracellular nucleic acids, leading to changes in enzymes and proteins and death.

Disadvantages: Poor penetration ability, and the penetration ability in the air is affected by dust particles and humidity; The UVC band requires a high level of irradiation energy and lasts for a certain period of time.

Ozone disinfection:

Principle: Ozone is a strong oxidant that can directly interact with bacteria and viruses, achieving the goal of sterilization, disinfection, and water purification by destroying organelles, DNA, RNA, enzymes required for glucose in cells, or acting on lipoproteins, lipopolysaccharides, and other substances on cell membranes. A versatile and efficient rapid fungicide that can kill various bacteria, viruses, and microorganisms.

Disadvantages: It releases high concentrations of ozone, which is harmful to human health and is an environmental pollutant gas.

Plasma antivirus:

Principle: Using a high-energy ion generator, trillions of positive and negative ions are instantly released, and a large amount of energy is generated through the annihilation of positive and negative ions, thereby destroying bacterial cell membranes and directly targeting cell nucleic acids, achieving the purpose of disinfection and sterilization.

Disadvantages: Requires special equipment and incomplete antivirus.

Photocatalyst antivirus:

Principle: Photocatalyst is a recently emerging new method of antivirus, and its working principle is actually very simple. It uses titanium dioxide as a photocatalyst to generate positive and negative electrons when exposed to light. Positrons combine with water molecules in the air to produce hydroxyl radicals with oxidative decomposition ability, while negative electrons combine with oxygen in the air to form reactive oxygen species. Both have strong antivirus and bactericidal abilities, and can decompose common organic compounds such as formaldehyde, ammonia, and benzene in car cabins, while also removing floating bacteria in the cabin.

Disadvantage: Low efficiency, can only eliminate air, surface bacteria and viruses, difficult to eliminate

Chemical drug disinfection

Chemical disinfectant: covering a wide range of fields, suitable for air, surfaces, and easy to use

Disadvantages: There are multiple categories and varying levels of effectiveness, making it difficult to choose. Additionally, most efficient medical disinfectants have unpleasant odors.

In summary, at the current level of technology, traditional disinfectant methods are more effective in achieving convenient and rapid disinfection of dirt on the surface of objects, and are not easily replaced.

However, the disinfection effect of disinfectants varies greatly depending on the sensitivity of different microorganisms to disinfection factors and the composition of different components.

Efficient disinfectant:

It can kill various bacterial reproductive forms, viruses, fungi, and their spores, and also has a certain killing effect on bacterial spores, meeting high-level disinfection requirements, including chlorine containing disinfectants, ozone, methylhydantoin compounds, double chain quaternary ammonium salts, etc. Efficient disinfectants that can meet sterilization requirements are also known as sterilizers, including formaldehyde, glutaraldehyde, ethylene oxide, peracetic acid, hydrogen peroxide, chlorine dioxide, etc.

Intermediate disinfectant:

It can kill bacterial colonies, mycobacteria, fungi, viruses and other microorganisms to meet disinfection requirements, including iodine containing disinfectants, alcohol disinfectants, phenolic disinfectants, etc.

Low efficiency disinfectant:

It can only kill some bacterial colonies, fungi, and enveloped viruses, and cannot kill tuberculosis bacteria, bacterial spores, and strong fungi and viruses. It meets the requirements of disinfectants, including quaternary ammonium salt disinfectants such as benzalkonium bromide, biguanide disinfectants such as chlorhexidine (chlorhexidine), metal ion disinfectants such as mercury, silver, copper, and traditional Chinese medicine disinfectants.

Bowome disinfectant is a medium and high grade disinfectant, which can easily disinfection and sterilization COVID-19 and its variants, and can inhibit or disinfection and sterilization most kinds of microbial infection sources.