流动导向元件（FGE）改性的薄膜 UV-C 反应器对牛奶中大肠杆菌和无害李斯特菌的灭活。
Inactivation of E. coli and L. innocua in milk by a thin film UV-C reactor modified with flow guiding elements (FGE).
机构信息
Department of Food Technology, Çorlu Vocational School, Tekirdağ Namık Kemal University, Tekirdağ 59830, Turkey.
Department of Food Technology and Bioprocess Engineering, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, 76131 Karlsruhe, Germany.
出版信息
Int J Food Microbiol. 2021 Apr 2;343:109105. doi: 10.1016/j.ijfoodmicro.2021.109105. Epub 2021 Feb 18.
In this study the suitability of a thin-film reactor (TFR) equipped with special flow guiding elements (FGE) was examined to analyse its capability to inactivate microorganisms in milk. Experiments were carried out with UHT-milk inoculated with Escherichia coli (E. coli), DH5α and Listeria innocua (L. innocua) WS 2258. Furthermore, the inactivation of microorganisms originally occurring in raw milk was investigated. E. coli, DH5α and L. innocua serving as biodosimeter were reduced by 4.58-log and 3.19-log, respectively. In milk, the original microorganisms showed a 4-log reduction. Without FGE the reduction was below 0.13-log. Thus, it can be derived that the efficacy of a UV-C thin-film reactor processing absorptive media like milk can be highly improved using FGE.
本研究考察了配备特殊导流元件（FGE）的薄膜反应器（TFR）在分析其灭活牛奶中微生物能力方面的适用性。实验用超高温（UHT）牛奶接种了大肠杆菌（E. coli）、DH5α 和无害李斯特菌（L. innocua）WS 2258。此外，还研究了原奶中微生物的灭活情况。作为生物指示剂的大肠杆菌、DH5α 和无害李斯特菌分别减少了 4.58 对数和 3.19 对数，而牛奶中原有的微生物减少了 4 对数。如果没有 FGE，则减少量低于 0.13 对数。因此，可以得出结论，使用 FGE 可以显著提高像牛奶这样的吸收性介质的 UV-C 薄膜反应器处理的效果。
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