Food spoiling

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This Presentation describes how food is spoiled

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Food spoiling

  1. 1. Vigyan Ashram Pabal
  2. 2. Why does the food spoil?  When is food spoilt: - we keep bread or chapattis in free air for few days’ .A fungi or sponge growth is seen on i.e. black or white colour?  We keep any food after cooking in copper pot or milk in free air for long time period it get spoilt because of bacterial affection or metallic reaction. 
  3. 3. Food Spoilage factor  Some enzymes occur in food .Food get spoilt mainly due to the presence of microorganisms, enzymes, insect, worm and rats. The spoilage factor  Presence of micro organism - Micro organism required moisture and air it rapidly grow.
  4. 4. Growth of Microorganisms
  5. 5. Microorganisms  Microorganisms are commonly called microbes  Bacteria are also types of Microorganisms  Microorganisms are spread everywhere  Microorganisms are useful ones and also harmful ones
  6. 6. Enzymes  Presence of enzymes: - Enzymes are chemical substances found in all plants and animals. - If we keep green mango in grass its color changes green to yellow and after it changes in black spot on it. - This due to continue action of enzymes.
  7. 7. Why Food Preservation necesacary?  Some time we see that small insect or worm occur in dal or rice or in any grain .  They eat the food grains and convert it in to powder .  Such food is unfit to human.
  8. 8. Principles of Food Preservation
  9. 9. Summary  Factors responsible for spoiling food  Enzymes  Microorganisms or Bacteria

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