Inactivation of bacteria found in solid particulate foods by using a continuous UV irradiation system
2001
Tsuchido, T. (Kansai Univ., Suita, Osaka (Japan). Faculty of Engineering) | Hayashi, M. | Matsumura, Y. | Ohya, S.
We examined the effectiveness of a continuous tube-flow type UV irradiation system developed for cold pasteurization of solid particulate foods in flowing air. Among the six kinds of solid particulate foods tested, black pepper, red pepper, and oolong tea leaves could not be sterilized, since these were contaminated with bacterial spores which accounted for almost all counts of detectable bacteria. An apparently marked inactivation effect was obtained with green laver contaminated with relatively high counts of nonsporing bacteria. The effect of the irradiation system on green laver depended upon the flow rate of air supply and the irradiation time within the first 4 s. This system is not effective for killing bacterial spores but can be applied to kill vegetative cells.
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