The Sterilization Effect Of Autoclave Using Damp Heat Is Better Than Dry Heat. What Are The Reasons?

The high-pressure steam sterilizer adopts the moist heat sterilization method. At the same temperature, the sterilization effect of the moist heat is better than the dry heat, for the following reasons.

1. The temperature required for protein coagulation is related to its water content. The higher the water content, the lower the temperature required for solidification to occur. The bacterial protein at the time of moist heat sterilization absorbs moisture and is thus more likely to solidify than dry hot air at the same temperature.

2. The steam releases a large amount of latent heat during the moist heat sterilization process to further increase the temperature. At the same temperature, the heat sterilization time is shorter than the dry heat.


3. The penetrating power of the hot and humid gas is stronger than that of the dry hot gas, so the moist heat is better than the dry heat. High-pressure steam can kill all microorganisms, even bacteria such as bacterial spores, fungal spores and other high temperature resistant individuals. The sterilized steam temperature increases as the vapor pressure increases, and the sterilization time can be greatly shortened by increasing the steam pressure. It is therefore one of the most effective and widely used methods of sterilization.