Detection and removal of metallic foreign substances in powdered foods using electric fields

Jae Kyun Kwak; Seong Yong Joe; Jun-Hwi So; Sang Hui Kim; Solim Lee; Seung Hyun Lee

doi:10.22765/pastj.20250008

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2025 Vol.7, Issue 2 Next Page

Research Article

Detection and removal of metallic foreign substances in powdered foods using electric fields

30 June 2025. pp. 95-102

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Abstract

Powdered agricultural products have gained popularity due to their convenience and extended shelf life. However, the presence of metallic contaminants, often introduced during milling or processing, has raised significant safety concerns. Conventional detection systems, such as magnetic separators and X-ray devices, face challenges including high costs, limited applicability in small-scale operations, and difficulties in detecting non-ferrous metals like aluminum and copper. To address these issues, this study explores the use of electric fields for metallic contaminant detection and removal. Stainless steel, aluminum, and copper particles were tested to determine their responsiveness in electric fields. The optimal electric field strength for each metal was identified using an IGBT-based power supply, with stainless steel showing the highest sensitivity at 1,000 V. A mesh-shaped electrode design was developed to enhance detection accuracy while minimizing particle aggregation and system malfunctions. Results demonstrated that higher voltages improved detection performance, and the system effectively differentiated between metal types. This research provides a foundation for an innovative and cost-effective detection method suitable for small-scale processing facilities. Future work will focus on refining system designs and validating their performance in real-world food processing environments to ensure broader industry adoption.

Keywords

Electric field

Foreign matter detection

Response analysis

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Information

Publisher :Korean Society of Precision Agriculture
Publisher(Ko) :한국정밀농업학회
Journal Title :Precision Agriculture Science and Technology
Journal Title(Ko) :정밀농업과학기술
Volume : 7
No :2
Pages :95-102
Received Date : 2025-05-20
Revised Date : 2025-06-20
Accepted Date : 2025-06-21
DOI :https://doi.org/10.22765/pastj.20250008

Precision Agriculture Science and Technology ISSN:2672-0086(Print) 2713-5632(Online) 정밀농업과학기술

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