Effect of pulsed light on bacterium sterilization of beverage bottle cap

Authors

CHEN Jin-ding, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; China Light Industry Key Laboratory of Healthy Beverages, China Agricultural University, Beijing 100083, China
WANG Yuan, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; China Light Industry Key Laboratory of Healthy Beverages, China Agricultural University, Beijing 100083, China
MAO Li-ke, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; China Light Industry Key Laboratory of Healthy Beverages, China Agricultural University, Beijing 100083, China
LIU Jin-fang, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; China Light Industry Key Laboratory of Healthy Beverages, China Agricultural University, Beijing 100083, China
GAO Yan-xiang, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; China Light Industry Key Laboratory of Healthy Beverages, China Agricultural University, Beijing 100083, China

Abstract

Objective: This study aimed to study the effect of pulsed light on sterilization of beverage bottle caps and to expand its application in PET aseptic filling. Methods: The effect of pulsed light (PL) on the sterilization of 38 mm and 28 mm beverage bottle caps was evaluated. The factors affecting sterilization efficiency included initial aerobic bacterial count, PL irradiation distance and pulse frequency. Results: The results showed that the sterilization efficiency was proportional to the initial aerobic bacterial count and flash time, while it was inversely proportional to PL irradiation distance. When the PL treatment was performed by 7 cm irradiation distance and 5 flash times, the maximum sterilization efficiencies for 38 mm and 28 mm bottle caps were 4.87 log and 4.71 log, respectively. Meanwhile, the bacillus on bottle caps were entirely killed with the initial aerobic bacterial counts of 1×10² CFU. While the PL treatment was conducted by 7 cm irradiation distance and ten flash times, the maximum sterilization efficiencies for 38 mm and 28 mm bottle caps were 5.34 log and 5.28 log, respectively. Moreover, the bacillus on bottle caps was killed completely with the initial aerobic bacterial counts of 1×10³ CFU. Conclusion: The pulsed light sterilization technology could kill the bacillus on the bottle caps to a certain extent and be applied to sterilizing HDPE bottle caps in the aseptic filling process of beverage products.

Publication Date

7-28-2021

First Page

183

Last Page

187,212

DOI

10.13652/j.issn.1003-5788.2021.07.030

Recommended Citation

Jin-ding, CHEN; Yuan, WANG; Li-ke, MAO; Jin-fang, LIU; and Yan-xiang, GAO (2021) "Effect of pulsed light on bacterium sterilization of beverage bottle cap," Food and Machinery: Vol. 37: Iss. 7, Article 30.
DOI: 10.13652/j.issn.1003-5788.2021.07.030
Available at: https://www.ifoodmm.cn/journal/vol37/iss7/30

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