|
KMID : 1024420210250030240
|
|
Food Engineering Progress
2021 Volume.25 No. 3 p.240 ~ p.246
|
|
|
Effect of Inactivation on Escherichia coli as Panel Materials of Treatment Chamber Used in Intense Pulsed Light Treatment
|
|
Park Ju-An
Shin Jung-Kue
|
|
|
Abstract
|
|
|
In this study, the inactivation effect of intense pulsed light with the materials of the treatment chamber was investigated.
The UV-C light amount of the light source of the control was 3.595 W/m2. The UV-C light quantity of quartz with a thickness of 1 mm was 3.356 W/m2, acrylic 0.878 W/m2, and glass 0.06 W/m2, and the light transmittance was 93.4% for quartz, 24.4 for acrylic, and 1.7% for glass. As for the bactericidal effect of the materials of the treatment chamber, quartz showed the same inactivation effect as the control regardless of material thickness.
A 1 mm thick acrylic showed a lethal effect of 1.1 logs after 60 s and 5.0 logs after treatment for 180 s. As the thickness increased, the lethal effect was significantly reduced. Glass had no sterilization effect regardless of its thickness. All of the death curve patterns except for glass showed a bi-phasic form. For the death rate constant and D value, the k 1 was 0.287 s?1, k 2 was 0.072 s?1, D1 value was 8.02 s, and D2 value was 31.87 s. At a thickness of 1 mm, k 1 was 0.284 s?1 and k 2 was 0.069 s?1 for quartz, k 1 was 0.018 s?1 and k 2 was 0.042 s?1 for acrylic, and k was 0.004 s?1 for glass. The D values were D1=8.11 s, D2=33.87 s for quartz, D1=127.94s, D2=54.83 s for acrylic, and D=575.75 s for glass.
|
|
|
KEYWORD
|
|
|
intense pulsed light (IPL), Escherichia coli, microbial inactivation, chamber materials, quartz
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|