I recovered 2 different species of yeasts from post CIP swabs at our filler nozzles. Our product is hot filled no colder than 180 F (82.2 C), but usually around 187 F (86.1 C). From there they travel to a cooling tunnel ~ 40 seconds away. I am having trouble finding a study that exposes yeasts to this temp range. I have seen some people saying 160 for 10-15 minutes to ensure no recovery, but nothing to verify that claim. I want to ensure that the product is hot enough for long enough to avoid any spoilage risk. Product pH is usually around 3.6. Has anyone seen a study that has this information?
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