期刊
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
卷 54, 期 -, 页码 34-42出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ifset.2019.03.003
关键词
Cordyceps militaris; Infrared freeze drying; Energy consumption; Nutritional properties; Antioxidant activities
资金
- National Key R&D Program of China [2017YFD0400901]
- Jiangsu Province (China) Agricultural Innovation Project [(17)2017]
- Jiangsu Province Key Laboratory Project of Advanced Food Manufacturing Equipment and Technology [FMZ201803]
- National First-class Discipline Program of Food Science and Technology [JUFSTR20180205]
A novel laboratory scale apparatus using infrared lamps replacing the electric heating plate for the freeze drying of Cordyceps militaris was developed in this study. The drying time, energy consumption, nutritional properties, antioxidant activities and main volatile compounds of Cordyceps militaris dried by infrared freeze drying (IRFD) and traditional freeze drying (TFD) at different drying temperatures (40, 50, 60 and 70 degrees C) were compared. Results indicated that drying at 40, 50 and 60 degrees C resulted in higher retention of cordycepin, total phenolics, hydroxyl radical scavenging activity, reducing power, 3-octanone, 3-octanol and 1,3-octadiene when compared with those dried at 70 degrees C. IRFD could reduce 7.21-17.78% of the drying time and 11.88-18.37% of the energy consumption at a constant drying temperature in comparison of TFD. In terms of quality, IRFD and TFD had similar retention effects on cordycepin, adenosine, hydroxyl radical scavenging activity and reducing power. Consequently, the results suggest that IRFD should be a promising approach for achieving high-quality dried products. Industrial relevance. IRFD could reduce 7.21-17.78% of the drying time and 11.88-18.37% of the energy consumption at a constant drying temperature in comparison of TFD without compromising the quality of the dried product. This study can help food processing industries to produce high quality freeze dried Cordyceps 'Matins and many other foods with an energy efficient freeze drying process.
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