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Ginger slices drying
2026-06-24
Drying ginger slices is a crucial step in ginger processing. A reasonable drying process can not only significantly shorten processing time, but also maximize the retention of core components such as gingerol in ginger, enhancing product color and flavor. Based on current processing techniques,
1. Core process parameters and temperature control
Conventional hot air drying: The temperature is usually controlled between 65 ℃ and 70 ℃. The temperature should gradually increase during drying to prevent internal starch from saccharifying, deteriorating, and becoming sticky.
Microwave combined with hot air drying: This is currently a highly efficient and high-quality process. The optimal hot air drying temperature is about 63.5 ℃, combined with microwave (such as 590W) penetrating the interior to accelerate drying. This not only avoids surface hardening, but also significantly increases the content of gingerol and greatly shortens the drying time.
Heat pump drying: The temperature is usually set at around 74 ℃, combined with appropriate slice thickness (such as 5mm), which can make the dried ginger slices have good color and high gingerol content.
2. Pre treatment process (key to improving quality)
Proper pretreatment of fresh ginger before drying can help improve the quality of the final product
Boiling water blanching: Blanch the cut ginger slices in boiling water for 5-6 minutes to moisten and clean the starch inside the ginger.
Sulfur fumigation treatment (traditional process): Use 1.5 kilograms of sulfur for about 5 minutes for every 100 kilograms of fresh ginger, then rinse with cold water and send it to the drying room. The ginger slices made by this traditional processing method have the effects of restoring yang, warming the lungs, and resolving phlegm.
3. Industrial drying equipment and advantages
With the upgrading of industries, traditional natural drying (which takes 7-8 days) is being replaced by automated mechanical drying (which only takes about 24 hours):
Equipment types: Common ones include continuous dryers, air source heat pump drying rooms, and microwave combined drying equipment.
Core advantage: Modern dryers often use strong and clean hot air, simulating the principle of natural air drying, achieving temperature zoning, first in first out, and uniform drying. This not only significantly reduces the labor intensity of manual handling, but also enables large-scale processing in a short period of time, maintaining the natural color and flavor of dried ginger slices.
4. Differences in drying of special products (such as ginger sugar tablets)
If making snack foods such as ginger sugar slices, the drying temperature needs to be significantly reduced. Usually, after sugar boiling, it needs to be placed in a baking oven and baked at a low temperature of 40 ℃ to 50 ℃ for about 4 hours to achieve the purpose of drying into white ginger sugar slices
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