Ozone is a strong oxidant that can destroy the cell walls of microorganisms and biological macromolecules such as nucleic acids and proteins in the cells, thereby achieving the effect of disinfection and sterilization. The concentration and action time of ozone will affect its sterilization efficiency and scope. Generally speaking, the higher the concentration of ozone, the shorter the action time, and the better the sterilization effect, and vice versa. However, the concentration of ozone cannot be too high, otherwise it will cause harm to the human body and the environment.
According to different applications and purposes, the concentration of ozone can be divided into three types: low concentration, medium concentration and high concentration. The specific values may vary due to different standards and methods, but they can generally be divided according to the following ranges:
Low concentration ozone: refers to the range of ozone concentration in the air between 0.01~0.1 ppm (i.e. 10~100 μg/m³). This concentration of ozone can be used for air purification and deodorization, and is basically harmless to humans and plants, but its killing effect on bacteria and viruses is weak and requires a longer action time (at least 30 minutes) to achieve a certain effect. . Low-concentration ozone can be generated through ionization, ultraviolet light, photocatalysis, etc. Common applications include homes, offices, hospitals, hotels, vehicles, etc.
Medium concentration ozone: refers to the range of ozone concentration in the air between 0.1~10 ppm (i.e. 100~10000 μg/m³). This concentration of ozone can be used for water treatment and food preservation. It will cause certain irritation and damage to the human body and plants, but it has a strong killing effect on bacteria and viruses and requires a short action time (a few minutes to tens of minutes). ) can achieve better results. Medium concentration ozone can be generated through corona discharge, ozone generator, etc. Common application places include water plants, sewage treatment plants, beverage plants, food plants, cold storage, etc.
High concentration of ozone: refers to the range of ozone concentration in the air between 10 and 100 ppm (i.e. 10,000 to 100,000 μg/m³). This concentration of ozone can be used for industrial oxidation and disinfection. It is highly toxic and harmful to the human body and plants, but it has a very strong killing effect on bacteria and viruses and requires a short action time (a few seconds to a few seconds). minutes) can achieve excellent results. High-concentration ozone can be generated through high-voltage discharge, ozone generators, etc. Common application sites include chemical plants, pharmaceutical plants, medical device factories, and laboratories.
