Raspberries
Recommended
Conventional cooling
Dynamic Cooling
Pre-cooling
De-greening
Ripening
General Tips for Raspberries
| Storage temperature | Relative Humidity (RH) | Duration | Pre-cooling | Sensitivity to ethylene | Ethylene Production | Controlled Atmosphere |
|---|---|---|---|---|---|---|
|
Storage temperature:
0° C
|
Relative Humidity (RH):
90%-95%
|
Duration:
2-5 days
|
Pre-cooling:
Air cooling
|
Sensitivity to ethylene:
Low
|
Ethylene Production:
Low
|
Controlled Atmosphere:
Not recommended
|
Storage Temperature: Recommended storage temperature is 0 °C. |
High Humidity: Use humidifiers capable of precise control to maintain maximum desired humidity, or select an air cooler with a narrow temperature differential (ΔT). |
Storage Duration: Recommended period is 2 – 5 days. |
Ozone: Installation of an ozone-generation system is advised to reduce microbial load. |
Controlled Atmosphere: Not recommended — uneconomical for small-scale production, with minimal storage benefits. |
Dynamic Pre-Cooling: A detailed study of temperature absorption time and airspeed ensures uniform cooling to the core of the pre-cooled product. |
IMPORTANT TIPS
- Rapid pre-cooling at 2 °C and maintenance of the cold chain throughout all stages of handling and distribution.
- Maintain uniform temperature within the cold-storage chambers.
- Dynamic Pre-Cooling is essential to ensure even and effective temperature reduction.
- Cooling should be achieved with low air velocity to avoid physical damage.
- Avoid condensation or water droplet formation on the product surface.
- Disinfect cold-storage chambers thoroughly before use.
- Avoid external odors — raspberries easily absorb ambient smells.
- Remove ethylene from the storage environment.
- Maintain high CO₂ concentrations, but not above 25 %, as excessive levels may cause flavor deterioration and surface browning.