Freezing Method Of Food Preservation

Freezing is a modern and yet common method of food preservation nowadays. Since refrigerators and freezers have become common household appliances, it has made food preservation become more effective since people now have the means to conveniently store food and make the last longer. But how freezing does this may not yet be entirely clear for most people.

How freezing preserves food
Freezing enables food to be stored for long periods of time mainly because it helps limit microbial activity that may cause them to spoil. Any bacteria found in food cannot grow or develop in low temperatures. It may slow down the bacterial activity that causes spoilage. Not only that, freezing keeps the water content in food frozen solid. This helps slow down some of the chemical reactions that may cause food to spoil.

Storage Life
Freezing food can effectively increase their storing period. But this would both depend on the type of food as well as the maintained storage temperature. The rule is that, the lower the temperature, the better. Foods on deep freeze would usually retain its quality for at least six months. But this has to be maintained consistently. Sometimes when the temperature varies, it may affect the quality of preserving some of the food products.

Any type of food can be frozen and preserved. There are certain exceptions such as canned food and egg shells which do not benefit from any form of freezing. But freezing the food can sometimes only go so far in trying to preserve the quality of food. Although freezing food may hinder the growth of bacteria and slow down its activity. But eventually the food may still deteriorate and become bad.

Freezer Burn
Freezer burn is caused when some parts of frozen food surface comes into contact with air. This causes the surface to oxidize and cause some discoloration especially in meat. Freezer burns are in no way unsafe, they may just appear bad due to the discoloration. One way to remedy this is by cutting away the area affected by the freezer burn before cooking.

Freezing Vegetables
In the case vegetables, blanching them before freezing seems to be the most effective way of preserving them. Blanching is the process of heating food in boiling water for a short period of time. Blanching vegetables kills the bacteria in the as well as break down the enzymes that may cause spoilage. Doing this before freezing vegetables makes a good food preservation practice.
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