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Impact of Various Drying Technologies on the Drying Characteristics, Physico-chemical Properties, and Antioxidant Capacity of Walnut Green Husk

文献类型: 外文期刊

作者: Ao, Jingfang 1 ; Wang, Jun 1 ; Shen, Heyu 1 ; Xie, Yongkang 2 ; Cai, Yingying 1 ; Xi, Meihua 1 ; Hou, Yujie 1 ; Li, Mei 1 ; Luo, Anwei 1 ;

作者机构: 1.Northwest A&F Univ, Coll Food Sci & Engn, Yangling 712100, Shaanxi, Peoples R China

2.Henan Acad Agr Sci, Zhengzhou 450002, Peoples R China

关键词: Agricultural products drying; Bioactive compounds; Microstructure; Quality change; Specific energy consumption; Walnut green husk

期刊名称:FOOD AND BIOPROCESS TECHNOLOGY ( 影响因子:5.6; 五年影响因子:5.8 )

ISSN: 1935-5130

年卷期: 2024 年

页码:

收录情况: SCI

摘要: Walnut green husk (WGH) is a common agricultural by-product with high yield and serious pollution problem. The present study aimed to evaluate the impacts of sun drying (SD), pulsed vacuum drying (PVD), short and medium infrared radiation drying (SMIR), hot air drying based on temperature and humidity control (TH-HAD), and heat pump drying (HPD) on the drying characteristics, energy consumption, physico-chemical properties, bioactive compounds content and antioxidant capacity of WGH. Drying characteristics and drying kinetics showed that artificial drying could significantly improve drying efficiency. Compared with SD, the drying time of PVD, SMIR, TH-HAD, and HPD reduced by 63.6, 78.7, 66.3, and 54.0%, respectively. Specific energy consumption analysis demonstrated that HPD showed the lowest specific energy consumption of 2.2 kWh/kg. Hydration properties analysis revealed that PVD resulted in sample of best water-holding capacity and the HPD sample had the highest water solubility index (43.44%). Structural analysis showed that the cell wall structure of WGH was damaged by different drying methods. Generally, among the five drying methods, HPD was found to be in the middle range in terms of active substance content and antioxidant capacity of dried samples, but it had the least energy consumption. Therefore, HPD has great potential for commercial-scale drying of WGH, offering a new approach for low-energy food processing.

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