Document Type



Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence


Microbiology, 2. ENGINEERING AND TECHNOLOGY, Bioprocessing technologies

Publication Details

Patil, S. Valdramidis, V.P. Cullen, P.J. Frias, J. Bourke P. (2010) Ozone inactivation of acid stressed Listeria monocytogenes and Listeria innocua in orange juice using a bubble column. Food Control, 21(13) 1723-1730.



Orange juice inoculated with Listeria monocytogenes strains ATCC 7644, NCTC 11994 and Listeria innocua NCTC 11288 (106 CFU/ml) as challenge microorganisms was treated with direct ozone at 0.098mg/min/ml for different time periods (0-8 min) using an ozone bubble column. Ozone treatment of mild acid stressed and mild acid stress-habituated (pH 5.5) cells of L. monocytogenes resulted in higher inactivation times compared to control non-acid stressed cells. Additionally acid stressed cells habituated in orange juice (ATCC 7644 & NCTC 11288), showed higher inactivation times during ozonation by comparison with the control as well as the mild-acid stressed cells. Overall the gaseous ozone treatment applied to orange juice resulted in a population reduction of 5 log cycles within a time range that varied between 5 to 9 min.



National Development Plan 2000-2006, through the Food Institutional Research Measure, administered by the Department of Agriculture, Fisheries & Food, Ireland.