Lettuce
Recommended
Conventional cooling
Dynamic Cooling
Pre-cooling
De-greening
Ripening
General Tips for Lettuce
| Storage temperature | Relative Humidity (RH) | Duration | Pre-cooling | Sensitivity to ethylene | Ethylene Production | Controlled Atmosphere |
|---|---|---|---|---|---|---|
|
Storage temperature:
0° – 1° C
|
Relative Humidity (RH):
90%-94%
|
Duration:
4-5 weeks
|
Pre-cooling:
Vacuum cooling or air cooling
|
Sensitivity to ethylene:
High
|
Ethylene Production:
Very low
|
Controlled Atmosphere:
Not recommended
|
Low-Pressure – Wet-Bulb Dynamic Pre-Cooling Chambers: Specialized units designed for rapid pre-cooling of unpackaged lettuce immediately after harvest. They regulate humidity and create low atmospheric pressure to achieve fast temperature reduction. |
Dynamic Pre-Cooling (High-Suction Capacity): Tailored design for airflow and temperature absorption to ensure uniform cooling throughout the product mass. Suitable for both packaged and unpackaged produce. |
Dynamic Cooling: Continuous 24-hour monitoring and regulation of all storage parameters across multiple points in the chamber, extending storage life by 15–20% compared to conventional methods. |
Low-Airflow Cold Room with Continuous Water Circulation: Designed for products requiring high humidity and gentle air circulation (<25 air exchanges/hour), maintaining optimal moisture levels with constant water flow. |
- Dynamic Cooling is essential for optimal lettuce preservation.
- Pre-cool quickly in Dynamic Pre-Cooling Chambers and maintain the cold chain throughout handling and transport.
- Install ozone generators to control fungal contamination.
- Keep CO₂ at low levels to reduce the risk of brown discoloration and maintain storage quality.
- Remove ethylene via ventilation or absorbers.
- Avoid storing lettuce alongside ethylene-emitting produce such as tomatoes or cucumbers.