Food Spoiling Vigyan Ashram Pabal

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.

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 factorPresence of micro organism - Micro organism required moisture

and air it rapidly grow.

Growth of Microorganisms

MicroorganismsMicroorganisms are commonly called

microbesBacteria are also types of MicroorganismsMicroorganisms are spread everywhere

Microorganisms are useful ones and also harmful ones

EnzymesPresence 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.

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.

Principles of Food Preservation

SummaryFactors responsible for spoiling food

EnzymesMicroorganisms or Bacteria