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Construction of a pilot-scale continuous-flow intense pulsed light system and its efficacy in sterilizing sesame seeds

Title
Construction of a pilot-scale continuous-flow intense pulsed light system and its efficacy in sterilizing sesame seeds
Authors
Hwang, Hee-JeongCheigh, Chan-IckChung, Myong-Soo
Ewha Authors
정명수
SCOPUS Author ID
정명수scopus
Issue Date
2017
Journal Title
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
ISSN
1466-8564JCR Link1878-5522JCR Link
Citation
vol. 39, pp. 1 - 6
Keywords
Intense pulsed light (IPL)Pilot-scaleCycloneSesame seedDecontamination efficiency
Publisher
ELSEVIER SCI LTD
Indexed
SCIE; SCOPUS WOS scopus
Abstract
The purpose of this study was to identify the decontamination level of a laboratory-scale intense pulsed light (IPL) system and compared with that of newly constructed pilot-scale system in our laboratory. Sesame seeds, in which the initial microbial load was 10(4)-10(5) CFU/g, were treated by laboratory-scale IPL treatment at a total fluence of 39.85 J/cm(2). 0.86 log microbial reduction was achieved and adding a mixing step increased this to a 1.02 log reduction. We concluded that combining a mixing process and powerful IPL is essential to decontaminate sesame seeds satisfactorily, and so a pilot-scale IPL device in which the sample is placed in a cyclonic flow was designed and constructed in our laboratory. The xenon lamp and power supply were also upgraded. This modified device achieved a 1.46 log reduction at a total fluence of 44.46 J/cm(2). Changing the material of the treatment chamber from acrylic to stainless steel induced light reflections that resulted in improvement of the decontamination efficiency. Although this study showed a potential of a pilot-scale IPL device for treating larger amount of sample at once, further studies of technical improvement are essential to achieve higher decontamination level. (C) 2016 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.ifset.2016.10.017
Appears in Collections:
엘텍공과대학 > 식품공학전공 > Journal papers
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