Methods of food preservation

1. Introduction

All methods of food preservation use the principle of modifying the atmosphere in such a way that 

a) microbes are either removed or killed, or can no longer multiply and spoil the food,

b) enzyme activity is controlled, and

c) oxidation and UV-light damage is prevented.

These methods are generally based on temperature control, pH control, moisture control, removal of air, or the use of chemical additives.