Main factors affecting the sterilization effect of canned food

**Factors Affecting Sterilization Effectiveness in Soft Cans**

1. **Residual Air Volume in the Bag**

- Excess air in the bag reduces heat conduction, leading to insufficient sterilization.

- Residual air volumes exceeding 20 mL can cause bag breakage during sterilization and affect food quality, particularly fats and vitamin C.

2. **Heat Distribution in the Sterilizer**

- Proper heat distribution is crucial. The sterilizer's heat transfer medium must flow uniformly, with a temperature difference of less than 0.5°C between the top and bottom.

- Ensure all air is expelled from the sterilizer before calculating sterilization time.

3. **Thickness of Soft Cans**

- Uniform bag thickness is essential to ensure consistent sterilization. Variations in thickness can lead to inadequate sterilization.

4. **Initial Temperature**

- The initial temperature of the food in the bag significantly impacts bacterial lethality. A specific initial temperature must be established for effective sterilization.

5. **Viscosity of the Food**

- High viscosity hinders heat transfer, affecting bacterial lethality. Ensure viscosity stays within the specified range.

6. **Food Formula**

- Ingredients like starch can insulate bacteria, reducing the sterilization effect. Sugary or spicy foods may contain heat-resistant bacteria that are harder to eliminate.

7. **Acidified Foods**

- Monitor the pH level to distinguish between low-acid and high-acid foods. Acidified foods require milder sterilization conditions.

8. **Sterilization Temperature and Time**

- Precise control of temperature and time is critical for food safety. Even minor deviations can lead to spoilage.

9. **Food Shape and Position**

- The shape and arrangement of food in the container influence the sterilization effect. Adapt the method to the food's shape for optimal results.

10. **Exhaust During Sterilization**

- Exhaust air within the first 5 minutes of sterilization. Frequent exhausts during the process ensure uniform temperature distribution.

By addressing these factors, the sterilization process can be optimized to ensure food safety and quality.