Question

why does milk get spoiled


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Answer 1

Answer:

If the temperature shifts too much, milk spoils more quickly. Continual and rapid temperature shifts can breed bacteria such as lactococci and lactobacilli. Milk spoils when bacteria converts the lactose into glucose and galactose, producing lactic acid. ... Spoiled milk smells sour and even foul.

Answer 2

Answer:

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Milk spoils when bacteria converts the lactose into glucose and galactose, producing lactic acid. Lactic acid creates casein and then forms a curd that can quickly curdle the milk within 24 hours. Once milk starts curdling toward the bottom of the jug, it's considered spoiled and should immediately be discarded.