The distinctiveness of green mandarin (green citrus) stems first from its growing environment. Xinhui, located in the Pearl River Delta, boasts a humid climate and fertile soil, creating ideal natural conditions for cultivating high-quality tea citrus. This variety is known for its thick peel, oil-rich glands, and a unique aromatic profile. After harvesting, green mandarin is not only sold as fresh fruit but also sent to food processing plants for further production. The introduction of freeze-drying technology has not only revolutionized the traditional processing methods but also infused new vitality into this age-old product. From harvest to finished product, every step is revitalized through the application of freeze-drying technology.
Traditional drying methods for green mandarin heavily rely on natural conditions, with sun-drying being highly susceptible to weather fluctuations. Rainy or humid conditions can lead to mold and spoilage, while excessive sun exposure may deplete the peel's active compounds. These uncertainties directly impact product quality and yield. Freeze-drying technology, however, removes moisture in a low-temperature vacuum environment, effectively preserving the active ingredients and natural form of green mandarin while avoiding the nutrient loss associated with conventional drying methods.
In the production of freeze-dried green mandarin, the freeze-dryer plays a critical role in the drying process. Prepared green mandarin is placed in the freeze-drying chamber, rapidly frozen at -40°C, and then subjected to a vacuum environment to sublimate moisture. This process typically takes 24 to 48 hours, significantly reducing production time compared to traditional sun-drying methods.
The moisture content of freeze-dried green mandarin is controlled below 5%, far lower than the 12% found in traditionally sun-dried products. This low moisture level not only extends shelf life but also significantly enhances the retention of active compounds, making the citrus more effective in releasing its aromatic substances. As a result, the application of freeze-drying technology in green mandarin processing represents a harmonious blend of science and tradition, paving the way for a new chapter in the citrus industry while delivering a superior product experience to consumers. This innovative approach also serves as a valuable reference for the deep processing of other agricultural products.
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Post time: Mar-26-2025
