数字农科院2.0

Experimental study, performance analysis, and optimization of hot Air-Membrane coupled dehumidification for ultra-drying of pumpkin seeds

文献类型： 外文期刊

作者： Wang, Yan;Wang, Jiaoling;Li, Yongchang;Ding, Tianhang;Song, Feihu;Jin, Guangyuan;Li, Xianfeng;Song, Chunfang;Song, Weidong

作者机构：

关键词： Pumpkin seeds;Membrane dehumidification;Energy analysis;Ultra-dring quality;RSM optimization

期刊名称： JOURNAL OF STORED PRODUCTS RESEARCH

ISSN： 0022-474X

年卷期： 2025 年 116 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Ultra-dry storage (less than 5 % moisture content, d.b.) can prolong the storage life of seeds. A hot air-membrane coupled dehumidification drying (HAMDH) system was developed for ultra-drying pumpkin seeds. Pumpkin seeds were dried at different temperatures (40 degrees C, 50 degrees C, and 60 degrees C) and ambient relative humidities (3 %, 7 %, and 11 %) to 3.5 % (d.b.). Drying kinetics, mathematical modeling, energy consumption, and seed quality, including germination characteristics, membrane lipid peroxidation, and antioxidant enzyme activities, were systematically investigated. The results showed that the Page model accurately described the drying behavior (R2 > 0.998), with effective moisture diffusivity (Deff) between 3.31 x 10(-10) and 9.56 x 10(-10) m(2)/s. Drying time decreased significantly with increasing temperature, while specific energy consumption (SEC) was influenced by both temperature and relative humidity. At 50 C-degrees, pumpkin seeds still maintained good germination characteristics, with the lowest malondialdehyde (MDA) content and higher antioxidant enzyme activity compared to those at 40 C-degrees. Response surface methodology (RSM) for multi-objective optimization was used to optimize the process parameters, identifying 51.5 C-degrees and 7.5 % humidity as optimal. The predicted optimal values were as follows: drying time of 225.56 min, Deff of 5.80 x 10(-10 )m(2)/s, Germination percentage of 95.56 %, MDA content of 3.32 nmol/g, and catalase activity of 268.22 U/(g & sdot;min), respectively. This study demonstrates that the HAMDH process could extend the storage lifespan of seeds while maintaining their bioactivity in oilseed crops.

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