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Minimization of water consumption in fresh-cut salad washing by UV-C light

Author:
Ignat, Alexandra, Manzocco, Lara, Bartolomeoli, Ingrid, Maifreni, Michela, Nicoli, Maria Cristina
Source:
Food control 2015 v.50 pp. 491-496
ISSN:
0956-7135
Subject:
Escherichia coli, Listeria monocytogenes, Salmonella enterica, Valerianella locusta, decontamination, fresh-cut produce, microorganisms, pathogens, recycling, salads, spectral analysis, ultraviolet radiation, washing
Abstract:
The decontamination effect of UV-C light at increasing fluence up to 1.2 kJ/m2 was studied with reference to natural microflora and inoculated pathogens in lamb's lettuce wash water. UV-C light dose of 0.4 kJ/m2 allowed to inactivate most of the native microflora and to achieve more than 5- Log-reductions in inoculated microorganisms (Salmonella enterica, Listeria monocytogenes and Escherichia coli). In multiple washing cycles up to 5, UV-C light treatment allowed to obtain more than 3-log reductions in native microflora in wash water. Spectral properties indicated that, independently on the number of recycling cycles, a considerable amount of UV-C light can penetrate wash water if its thickness is lower than circa 1 cm.
Agid:
5430847