Doses of 4–12 mJ/cm2 provide 1 log reduction of thermotolerant pathogens. coli with a dose of approximately 15 mJ/cm2. The pasteurization requirement is a 5 log pathogen reduction, which HTST achieves easily. Additionally, UV has the ability to inactivate thermotolerant pathogens that are not easily removed using HTST. Due to the much higher transmittance in cow water, UV disinfection provides an easy alternative. While the dairy facility already has the machinery for thermal pasteurization of cow water, it is not cost effective compared to methods such as UV Disinfection. Pasteurization for milk is a thermal process, termed a high temperature, short time (HTST) process. However, the PMO provides the minimum requirements for a milk production facility and additional requirements may exist at the state level. Pasteurized equivalent water produced following the PMO standards can be used without compromising the Grade A status of a production facility. Once the water is disinfected to remove milk-borne pathogens, the water can be reused for general water purposes throughout the milk production facility.įacilities under the purview of PMO are those producing, processing, and packaging regulated Grade A liquid milk products. After the removal of nearly all components from milk, the remaining product, called cow water, is already very similar to water. The regulated process is not for the pasteurization of milk, which itself has nearly no UV transmittance, but for the disinfection of a byproduct from whey production.

The pasteurized product water reduces water consumption from external sources and increases facility sustainability. One of the ways in which UV may be used in the dairy industry is in the creation of pasteurized equivalent water. Ultraviolet disinfection is permitted within milk production facilities and stipulations are provided by the FDA under the Pasteurized Milk Ordinance (PMO). Calibration Standards & Maintenance Kits.

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