• 基础研究 •

### 红心火龙果热风干燥动力学模型及品质变化

1. （黄山学院生命与环境科学学院，安徽?黄山 245041）
• 出版日期:2019-09-15 发布日期:2019-09-23
• 基金资助:
黄山学院人才启动项目（2018xkjq001）；安徽省大学生创新创业训练计划项目（201710375022；201810375080）； 黄山学院生态与健康技术中心科研平台项目（kypt201809）

### Hot-Air Drying of Red-Fleshed Pitaya: Kinetic Modelling and Quality Changes

CHU Wenjing, SHENG Danmei, ZHANG Nan, YU Yan, ZHANG Feng, YE Shuangshuang

1. (College of Life and Environment Sciences, HuangShan University, Huangshan 245041, China)
• Online:2019-09-15 Published:2019-09-23

Abstract: In order to improve the hot-air drying efficiency and the product quality, the drying characteristics and quality changes of red-fleshed pitaya were evaluated at different slice thicknesses (6, 8, 10 and 12 mm) and drying temperatures (50, 60, 70 and 80 ℃). The results showed that higher temperature and thinner slices led to higher drying rate and shorter drying time. The Page model could well reflect the change of moisture ratio with thickness and drying temperature during hot air drying. The effective moisture diffusion coefficient of red-fleshed pitaya ranged from 3.537 4 × 10-10–19.942 6 × 10-10 m2/s. The hot-air drying activation energy for 6, 8, 10, and 12 mm thick pitaya slices were 32.985 7, 27.086 1, 26.889 4 and 17.792 9 kJ/mol, respectively. Higher total phenol content and antioxidant activity were observed for the dried product obtained at drying temperature of 70 ℃, slice thickness of 6 mm and drying time of 6 h. Drying temperature and slice thickness had no significant effect on the color of the product.