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Food and Bioprocess Technology

, Volume 12, Issue 10, pp 1696–1707 | Cite as

Design and Optimization of a Microchip Operating at Low-Voltage Pulsed Electric Field for Juice Sterilization

  • Ning Zhu
  • Shun-liang Zhang
  • Jia-peng Li
  • Chao Qu
  • Ai-dong Sun
  • Xiao-ling QiaoEmail author
Original Paper
  • 80 Downloads

Abstract

Microchip has been widely used in the biochemical field, but it is rarely applied in the food area. In this paper, an optimal microelectrode model was obtained via the improved evolutionary structural optimization (ESO) method, the effect of topological parameters on the sterilization efficiency was clarified, and the optimized microchip was applied to the sterilization of blueberry juice to verify its feasibility. The analysis of finite element method (FEM) results showed that planar comb teeth (PCT) form, quadrilateral electrode structure with 100-μm electrode spacing, was the ideal model for the microchip. On the basis of the optimal electrode model, a continuous low-voltage pulsed electric field (LPEF) experimental platform was built. Under 400 V and 0.2-ms conditions, LPEF processing better preserved vitamin C, anthocyanin, total phenolics content, and color parameters while reducing microbial counts in blueberry juice significantly. During 30 days of storage at 4 °C, LPEF-treated juices had more vitamin C, anthocyanin content, and brighter color under the premise of ensuring microbiological safety, compared with high temperature short time (HTST) and pulsed electric field (PEF)-treated juices. This study provides theoretical and technological support for the widespread use of LPEF technology in the application of a non-thermal processing technique for food.

Keywords

Low-voltage pulsed electric field Blueberry juice FEM ESO 

Notes

Funding Information

Ning Zhu would like to thank the financial support from the “National key R&D program” (No. 2017YFD0400105).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Ning Zhu
    • 1
    • 2
  • Shun-liang Zhang
    • 1
    • 2
  • Jia-peng Li
    • 1
    • 2
  • Chao Qu
    • 1
    • 2
  • Ai-dong Sun
    • 3
  • Xiao-ling Qiao
    • 1
    • 2
    Email author
  1. 1.China Meat Research CentreBeijingChina
  2. 2.Beijing Key Laboratory of Meat Processing TechnologyBeijingChina
  3. 3.Department of Food Science and Engineering, College of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina

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