• 工艺技术 •

猕猴桃CO2-低温高压渗透膨化干燥工艺优化

1. （陕西科技大学机电工程学院，陕西 西安 710021）
• 出版日期:2020-02-25 发布日期:2020-03-02
• 基金资助:
“十三五”国家重点研发计划重点专项（2017YFD0400900）；陕西省科技统筹项目（2011KTCL02-19）

Optimization of CO2-Low Temperature High Pressure Permeation Drying Process of Kiwifruit

SONG Yifan, CHEN Haifeng, YUAN Yuejin

1. (College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China)
• Online:2020-02-25 Published:2020-03-02

Abstract: In order to optimize the explosion puffing drying process of kiwifruit by CO2-low temperature high pressure permeation, the one-factor-at-a-time and quadratic regression orthogonal rotary combination design methods were jointly adopted to study the influence of puffing pressure difference, puffing temperature and pumping time on the degree of expansion, hardness and brittleness of kiwifruit chips. The response surface methodology was further used to optimize the ranges of the three process parameters and the advantages of using CO2 as a puffing medium were evaluated by comparison with N2. The results showed that all the examined factors had significant effects on the puffing degree, hardness and brittleness of the product (P < 0.05), with a significant interaction between each other; the optimal process parameters were determined as follows: puffing pressure difference 1.03–1.1 MPa, puffing temperature 80–82.46 ℃, and pumping time 90–91.61 min. Compared with hot-air dried kiwifruit chips, kiwi chips prepared by CO2-low temperature high pressure permeation drying had a looser structure, better taste, and higher VC retention rate.