What causes milk to spoil?

Question

Why does it spoil?
Why doesnt it spoil in the refrigerator?

Answer 1

It does spoil in the fridge, just slower than it would at room temp.
the reason it spoils is because bacteria in it multiply over time and eventually cause it to sour. some of the bacteria that cause spoilage in milk are clostridium, lactobacillus and micrococcus.

Answer 2

Spoil Milk

Answer 3

There are some bacteria which spoil the milk when milk is kept in refrigerator at that time that bacteria can not spoil milk because of low temperature.

Answer 4

Fresh milk contains disease-causing bacteria, eg those responsible for tuberculosis and typhoid. Left out at room temper-ature these and other bacteria will cause milk to spoil. To destroy such bacteria, milk is pasteurised.

Commercial pasteurisation involves heating milk to 72°C for 15 s and then cooling rapidly to below 10°C. Stored in refrigerators pasteurised milk has a shelf-life of 20 days. Longer-life milk, known as UHT (ultrahigh temperature) milk, is pasteurised by heating to 135–150°C for 3–5 s. The resultant UHT milk has a shelf-life of ca six months at room temperature. However, the UHT process causes the formation of chemicals in the milk, such as volatile sulfur compounds (eg hydrogen sulfides), methyl ketones and aldehydes. According to food scientist Michael Qian and his team at Oregan State University, these chemicals impart a ‘cooked’ flavour to the milk, which has limited the popularity of UHT milk with consumers

Answer 5

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it just like everything else does have a date. there is only so long things can last before they go stale or spoil. milk tends to spoil if left out and getting warmed then re-refridgereated...this tends to cause bacterias to form and grow,,,, if its to much past its 'useby' date...it to then of course will go stale and spoil.... just part of lifes cycle...and food cycle

Answer 6

Milk is spoilt because of Bacterial growth in milk at warm temperatures, but where as in refrigerator it does not multiplicate due to low temperature(cold). Bacteria multiply in warm conditions

Answer 7

Bacteria. Below 32 degrees Farenheit, bacteria ordinary does not act. Therefore milk does not get spoilt in the fridge.

Answer 8

heat causes milk to spoil.

Answer 9

bacterias....in fridge as temp is low the bacteria growth is not there

Answer 10

leaving it out of the refrigerator for a long time.