Apples
Recommended
Conventional cooling
Dynamic Cooling
Pre-cooling
De-greening
Ripening
General Tips for Apples
| Storage temperature | Relative Humidity (RH) | Duration | Pre-cooling | Sensitivity to ethylene | Ethylene Production | Controlled Atmosphere |
|---|---|---|---|---|---|---|
|
Storage temperature:
-0,5° - 0° C
|
Relative Humidity (RH):
90%-92%
|
Duration:
3-6 months
|
Pre-cooling:
Not required
|
Sensitivity to ethylene:
High
|
Ethylene Production:
High
|
Controlled Atmosphere:
Recommended
|
Storage Temperature: Recommended range is −0.5 °C to 0 °C. |
High Humidity: Use an air-cooler with a low temperature differential (ΔT) between air inlet and outlet. |
Storage Duration: 3 – 6 months under conventional storage conditions. |
Ventilation: Install a digitally controlled ventilation system for optimal air exchange. |
Air Circulation: Use inverter-type fans with continuous digital control to ensure uniform air distribution 24/7. |
Ethylene Removal: The use of an ethylene burner or absorption system is strongly recommended. |
Dynamic Controlled Atmosphere: Recommended for long-term storage — can extend shelf life by up to four additional months. Example: Golden Delicious stored under a controlled mix of 1.0–1.3 % O₂ and 2.5–3.0 % CO₂ achieved a total preservation period of up to 300 days. |
Dynamic Cooling: Monitors and adjusts multiple parameters in real time, maintaining ideal conditions uniformly throughout the entire chamber volume. |
- Maintain the cold chain consistently throughout all handling and transport stages.
- Rapid cooling helps prevent gray mold (Botrytis cinerea) development.
- Uniform temperature inside the storage chambers is essential — the use of Dynamic Cooling is strongly advised.
- Keep CO₂ levels very low through proper ventilation; excessive CO₂ causes flavor degradation.
- Ensure cooling is achieved through low-velocity air circulation.
- For long-term storage, use chambers equipped with Dynamic Controlled Atmosphere systems.
- Ethylene removal is necessary to prevent premature ripening.
- Always disinfect cold rooms before use.