Why the pasteurised milk spoil?

Answer 1

Here are a few disadvantages I can think of:

* The equipment needed to pasteurize milk is complicated and expensive. * If the pasteurizing equipment is not maintained properly, the milk can spoil and/or spread disease. * A small farm has to be dependent upon a dairy operation as an outlet for their milk and is less likely to be able to sell it on their own. * The heating process changes the flavor and destroys some nutrients.

Answer 2

Pasteurization involves heating food to a temprature that kills disease-causing microorganism and substantialy reduces the levels of spoilage organisms. Such heat treatment is based on a statistical probability that the number of remaning viable microorganisms will be below a certain level after a particular heating time at a specific temprature. As it generally reduce the number but it is not possible to kill all or 100% microorganism by the process of pasteurization, so spoilage occur when pasteurized milk or food microorganism regain no. of cell or population which is sufficient to cause spoilage.

Answer 3

Pasteurized milk can spoil if it is not handled or stored properly. Factors such as improper refrigeration, contamination with bacteria from unsanitary equipment or environment, or the introduction of new bacteria after pasteurization can all contribute to spoilage. Additionally, the presence of certain spoilage-causing bacteria such as Pseudomonas can also lead to the spoilage of pasteurized milk.