What Happens When Milk Spoils? Understanding Fermentation in Milk

Learn about the fermentation process in spoiled milk and how bacteria transform lactose into lactic acid.

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Spoiled milk undergoes a chemical reaction called fermentation. During this process, bacteria such as Lactobacillus convert lactose into lactic acid. This increases the milk's acidity, causing it to curdle and develop a sour smell and taste.

FAQs & Answers

  1. What is the process of milk spoiling? Milk spoiling involves fermentation, where bacteria convert lactose into lactic acid, leading to sour taste and curdling.
  2. Why does spoiled milk smell bad? The sour smell of spoiled milk is due to the increase in lactic acid as a result of bacterial fermentation.
  3. Can spoiled milk be harmful? Yes, consuming spoiled milk can be harmful due to potential harmful bacteria; it's best to avoid it.

Watch More

To delve deeper into the science of dairy products and fermentation, check out our videos on yogurt making and the role of bacteria in food preservation.

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