Question

Explain any two methods for food preservation.
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Answer 1

Answer:

1. Fermenting :

• Fermenting is another ancient technique of food preservation that has remained popular to this day.
• The popularity is most likely attributed to the unique flavor that is accrued through fermentation.
• Fermentation itself is a form of food spoilage, but when the microorganisms are tightly controlled, it can produce desirable effects and provide safeguards against harmful organisms.
• The bacteria or yeast used in the fermentation process produce acid as a byproduct, which acts to prevents other, potentially harmful bacteria from thriving.

• As a bonus, many of the organisms used to ferment foods are also healthy additions to the natural flora of the human gastrointestinal tract. Both sauerkraut and kimchi are examples of the use of fermentation to preserve cabbage.

2.Salting:

• Salting preserves food by removing the moisture and creating an environment unsuitable for microbial growth.
• Very few bacteria grow in high salt solutions, so simply adding a very high amount of salt can be an effective method of preservation.
• Salting is one of the oldest known methods of food preservation.
• Natural sea salts abundant in the Mediterranean region were readily available in ancient times and were used to preserve meat, fish, vegetables, and even some fruit.

• The amount of salt alone needed to preserve food is extremely high and therefore can be unpalatable.
• Therefore, salt is often used in combination with another method, like dehydration or an acidic solution, to preserve food.
• Examples of salt-preserved foods include hard salamis, bacon, salt pork, smoked fish, anchovies, olives, pickles, and preserved lemons.

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Answer 2

Answer:

1. refrigerator

2. canning and bottling