Construction of a pilot-scale continuous-flow intense pulsed light system and its efficacy in sterilizing sesame seeds
- 주제(키워드) Cyclone , Decontamination efficiency , Intense pulsed light (IPL) , Pilot-scale , Sesame seed
- 등재 SCIE, SCOPUS
- 발행기관 Elsevier Ltd
- 발행년도 2017
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000139379
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.ifset.2016.10.017
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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 104–105 CFU/g, were treated by laboratory-scale IPL treatment at a total fluence of 39.85 J/cm2. 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/cm2. 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. © 2016 Elsevier Ltd
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