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A laboratory-scale UV-C treatment device based on Dean vortex technology was tested for its potential to inactivate spoilage microorganisms in cloudy fruit juices. A log 5 and log 6 reduction could be achieved by inactivating Lactobacillus plantarum BFE 5092 and Escherichia coli DH5α in naturally cloudy apple juice at 1.9 and 7.7kJ/L, respectively. A treatment with 9.6kJ/L led to an approximately...
A novel UV-C irradiation device in laboratory scale was tested for its potential to inactivate bacteria in naturally cloudy apple juice. In this device, liquid flows through a helically wound tubing wrapped around a quartz glass tube containing a 9W UV lamp with an irradiation intensity of 60W/m 2 at 254nm. The equipment was capable of reducing numbers of inoculated Escherichia coli and Lactobacillus...
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