List out the Different Preservation Techniques?
The different preservation techniques commonly used today are given in the Table.
Table: Methods of food preservation
a) Asepsis, or keeping out microorganisms
b) Removal of microorganisms (filtration, centrifugation, washing, trimming)
c) Maintenance of anaerobic conditions, e.g., in a sealed, evacuated container
d) Drying (drying under the sun, mechanical drying, freeze drying, smoking)
e) Use of high salt or sugar content (sugaring, pickling, curing etc)
f) Use of acids
g) Fermentation
h) Use of low temperatures (refrigeration, chilling, freezing)
i) Use of high temperatures (pasteurization, boiling, canning)
j) Mechanical destruction of microorganisms, e.g., by grinding, high pressure, etc
k) Chemical preservatives
l) Carbonation
m) Irradiation
n) Combination of the two or more of the above methods.