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Lettuce

Recommended

Conventional cooling

Dynamic Cooling

Pre-cooling

De-greening

Ripening

General Tips for Lettuce

Storage temperatureRelative Humidity (RH)DurationPre-coolingSensitivity to ethyleneEthylene ProductionControlled 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.

IMPORTANT TIPS
  • 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.