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VACUUM ›› 2023, Vol. 60 ›› Issue (2): 20-25.doi: 10.13385/j.cnki.vacuum.2023.02.03

• Vacuum Technology Application • Previous Articles     Next Articles

Study on the Process of Vacuum Freeze-drying Kiwifruit Powder

PENG Run-ling, WANG Wei, WEI Yan, QU An-na, ZHAI Hao-nan, LIU Jin-yue   

  1. School of Mechatronic Engineering, Xi′an Technological University, Xi′an 710021, China
  • Received:2022-06-07 Online:2023-03-25 Published:2023-03-27

Abstract: The effects of hot air drying, spray drying and freeze drying on the quality of kiwifruit powder are compared in this paper, and the effects of pre-freezing method, slurry ratio, type of drying aid and freshness of kiwifruit on the quality of kiwifruit powder prepared by freeze drying are studied. The results show that the freeze-dried kiwifruit powder has better overall quality, instant capacity and higher yield compared to hot air drying and spray drying. The preferred process for the preparation of kiwifruit powder by freeze-drying is to select nine-ripe kiwifruits(approximately 175days after flowering), peel, pulp, and add yogurt in a volume ratio of 1∶1 with kiwi pulp, then spread the slurry at a thickness of 4mm, pre-freeze at -20℃ and then dry it under vacuum for 10h.

Key words: freeze-drying, kiwi powder, vacuum, freeze-drying process

CLC Number: 

  • TG79
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