This article reviews various international standards on pasteurization process design aspects to prevent cross-contamination by raw milk/heat exchanging medias’ due to pin-hole, leak/hair line cracks in plates and gaskets during production, diversion as well as power failures. The design shall also address prevention of pasteurized milk cross contamination like, balance tank design, holding coil contamination during every diversion, re-infection through back growth of microorganism from return line, cross-contamination due to pin hole/ hair line cracks in PHE plates/gasket, siphonage of raw milk into pasteurized line due to vacuum creation during diversion. To ensure effective pasteurization of each particle of milk the design shall address: holding coil design, flow monitoring and control, flow diversion valve (FDV) design, placement, safe mode installation, temperature sensors response time and fail safe connection. ![]() ![]() Design aspects of the pasteurizer shall be able to address effective pasteurization of each particle of milk as well as to prevent cross contamination of pasteurized milk.
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