新疆农业科学 ›› 2025, Vol. 62 ›› Issue (5): 1179-1190.DOI: 10.6048/j.issn.1001-4330.2025.05.015

• 园艺特产·农产品加工工程 • 上一篇    下一篇

不同预处理对红枣热风微波耦合干燥特性及品质的影响

贾文婷1(), 李文绮2, 杨慧1, 李自芹1, 金新文1()   

  1. 1.新疆农垦科学院,新疆石河子 832000
    2.新疆石河子质量与计量检测所,新疆石河子 832000
  • 收稿日期:2024-10-21 出版日期:2025-05-20 发布日期:2025-07-09
  • 通信作者: 金新文(-),男,甘肃武威人,研究员,研究方向为果蔬加工及副产物综合利用,(E-mail)372557223@qq.com
  • 作者简介:贾文婷(-),女,河北鹿示人,副研究员,研究方向为农产品加工技术,(E-mail)jwt246@sina.com
  • 基金资助:
    新疆生产建设兵团创新科技人才计划项目(2021CB029);国家桃产业技术体系岗位科学家项目(CARS-30-5-04);新疆生产建设兵团农业科技创新工程专项(NCG202226);“兵团英才”青年项目(2023-2025)

Effects of different pretreatments combined in hot air and microwave coupled drying of jujube on drying characteristics and quality

JIA Wenting1(), LI Wenqi2, YANG Hui1, LI Ziqin1, JIN Xinwen1()   

  1. 1. Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi Xinjiang 832000, China
    2. Quality and Metrology Inspection Institute, Shihezi Xinjiang 832000, China
  • Received:2024-10-21 Published:2025-05-20 Online:2025-07-09
  • Supported by:
    Innovative S&T Talent Program Project of XPCC(2021CB029);National Peach Industry Technology System Post Scientist Project(CARS-30-5-04);Agricultural S&T innovation project special project of XPCC(NCG202226);XPCC Talent Youth Program(2023-2025)

摘要:

【目的】研究不同预处理对红枣热风微波耦合干燥特性及品质的影响。【方法】采用热烫、油酸乙酯结合预冻、二氧化碳浸渍3种不同预处理技术应用于红枣热风微波耦合干燥,分析产品的干燥速率、单位能耗和营养品质及香气成分。【结果】各预处理组的干燥速率均显著提高,预处理可以提高红枣干燥速率,其中油酸乙酯结合预冻处理组干燥速率最快;各预处理组色泽a*值均增加,预处理可以提高红枣干燥产品的色泽,其中二氧化碳浸渍处理组 ΔE* 值最小,颜色最接近于鲜样;二氧化碳浸渍预处理组样品的VC、酚类及酮类等活性成分含量最高,并且抗氧化性及自由基清除能力较强,具有较好的营养品质;通过微观结构观测,二氧化碳浸渍预处理组内部呈多小孔状,有利于加快干燥速率,降低干燥能耗;不同预处理组间挥发性成分差异显著,其中热烫处理组具有较多的挥发性成分。【结论】油酸乙酯结合预冻处理组干燥速率较快,但产品品质较差,活性成分损失严重;热烫处理组具有较多的挥发性成分,但干燥速率较低。二氧化碳浸渍预处理是红枣热风微波耦合干燥较适宜的前处理方式。

关键词: 红枣; 热风微波耦合干燥; 预处理; 干燥特性; 品质

Abstract:

【Objective】 Effects of different pretreatments combined in hot air and microwave coupled drying of jujube on drying characteristics and quality.【Methods】 Three different pretreatment techniques: blanching, ethyl oleate combined with pre-freezing and carbon dioxide impregnation were applied to hot-air and microwave coupling drying of jujube. The drying rate, unit energy consumption, quality and aroma components of the products were analyzed. 【Results】 The drying rate of each treatment group was significantly increased, indicating that pretreatment could improve the drying rate of jujube, and the drying rate of ethyl oleate combined with pre-freezing treatment group was the highest ; The color a* value of each treatment group increased, indicating that pretreatment could improve the color of dried jujube products. The ΔE* value of the carbon dioxide impregnation treatment group was the smallest, and the color was very similar to that of the fresh ones; The content of active ingredients such as vitamin C, phenols and ketones in the dried jujube samples of the carbon dioxide impregnation treatment group was the highest, and the antioxidant and free radical scavenging ability was high, which had the best nutritional quality ; Microstructure detection indicated that the internal structure of the carbon dioxide impregnation treatment group was porous, which was beneficial to speed up the drying rate and reduce the drying energy consumption; There were significant differences in volatile components among different treatment groups, and the blanching treatment group had more volatile components.【Conclusion】 Although the drying rate of ethyl oleate combined with pre-freezing treatment group is high, the product quality is poor and the loss of active ingredients is serious. Blanching treatment has more volatile substances, but its drying rate is low. Considering energy saving, high efficiency and product quality, carbon dioxide immersion treatment is a suitable pretreatment method for hot-air and microwave coupled drying of jujube.

Key words: jujube; microwave and hot air coupled drying; pretreatment; drying characteristic; quality

中图分类号: 


ISSN 1001-4330 CN 65-1097/S
邮发代号:58-18
国外代号:BM3342
主管:新疆农业科学院
主办:新疆农业科学院 新疆农业大学 新疆农学会

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