PRESERVATION OF FOOD
Food is preserved to prevent natural and microbiological decay!
Today food is preserved for these rea...
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Preservation of food

Published on: Mar 4, 2016
Source: www.slideshare.net


Transcripts - Preservation of food

  • 1. PRESERVATION OF FOOD Food is preserved to prevent natural and microbiological decay! Today food is preserved for these reasons: 1.to add variety to the diet 2.to make use of food when it is cheap and store for later 3.to vary the diet by preserving food in different ways 4.to save money, we do not need to buy extra food Aims of preservation Besides preventing decay, preservation also aims to retain these qualities: Ø flavour Ø texture Ø color of food Ø appearance Ø nutritional value removal of moisture (germs need it to live) removal of air (germs need it to live) Methods of preservation addition of a chemical preservative reduction of temperature antioxidants by refrigerator: reduce activity sodium chloride by freezing: being dormant sulphur dioxide acid-sugar heating sterilization pasteurization Ultra Heated Treatment (UHT) Canning - bottling

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