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Three precautions for cauliflower drying production
2026-09-30
1. The cutting should be even, and the blanching must be in place
The size of cauliflower slices directly affects the uniformity of drying. It is recommended to cut them into small pieces of about 3-5 centimeters to avoid the center of large pieces not drying and small pieces being too dry.
Blanching is crucial, it can be done with boiling water for 1-3 minutes, followed by rapid supercooling to cool down and draining. This can passivate enzymes, reduce browning, and improve the taste after rehydration.
If only making regular dehydrated vegetables, they can be blanched and drained directly before serving; If high color requirements are needed, low concentration citric acid solution can be used for short-term soaking to protect the color, but it must meet food grade requirements.
2. The drying temperature, wind speed, and tray thickness should be matched
The common temperature control for hot air drying is between 55-65 ℃, which is more stable. If it is too high, it is easy to dry outside and wet inside, aggravate browning, and reduce rehydration; If it is too low, the cycle will be long and the microbial risk will increase.
It is recommended to lay the plate with a thickness of 3-5 centimeters, leaving gaps between each flower to ensure the penetration of hot air.
Segmented temperature control can be adopted: in the early stage, surface water is discharged at about 50-55 ℃, in the middle stage, it is raised to around 60 ℃ to promote internal water migration, and in the later stage, it is appropriately raised to 60-62 ℃ for drying.
At the same time, it is necessary to maintain smooth dehumidification and avoid excessive humidity in the drying room, which can cause "stuffiness". The moisture content of the finished product should generally be controlled below 6% -7%.
3. After discharge, it must be cooled, tested for moisture, and sealed in packaging
After drying, it should not be directly bagged while still hot, otherwise the residual heat will redistribute the internal moisture, making it easy to regain moisture, clump, or even mold. It should be cooled to near room temperature before testing for moisture.
The relative humidity of the packaging environment should be kept as low as possible, and it is recommended to control it below 45%. Aluminum foil composite bags or vacuum packaging should be prioritized.
Store in a cool, dry, and dark place; If the environment is humid, desiccants or low-temperature refrigeration can be used to prevent moisture absorption and deterioration.
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