There are
several ways for emergency food storage. Freeze drying and Dehydration are two
popular methods for emergency food storage.
Among all the food storage techniques freeze drying is the best because
of its advantage along with proper effectiveness and efficiency. If you have never attempted freeze drying
process for food storage you may understand that how it varies from other
storage methods especially dehydration. Both are used to protect foodstuffs for
satisfying long time and emergency needs with realistic usability.
Freeze dried
food and food dehydration methods utilize limitlessly distinctive strategies to
"dry" out food. Both are made utilizing safeguarding techniques that annihilate
the humidity and perishable substance out of food, keeping it from ruining for
an unimaginably long time. These are uniquely dissimilar to each other from
multiple points of view. The following comparative discussion proves that
freeze drying is the best food storage technique for emergency food storage.
Food Dehydration Technique
Food dehydration
is prepared by subjecting foodstuffs to high temperature. Commonly this method
is applied sun drying or air drying in high temperature. It can be utilized
within home storing supplies due to its long timeframe with genuine usability.
Dehydrated foods can be utilized for day by day cooking and eating. In case of
emergency needs for instance, natural catastrophe and earthquake situations dehydration
technique is used for preserving foodstuffs.
Practically,
tastes and flavors will not remain unchanged. The dehydration methodology changes
the taste and composition inside the food. To enjoy the food need much of their
unique flavor and taste. They additionally have a chewier composition.
Concerning taste, you can get slightly changed flavors from dehydrated foods,
in the same way as sun dried tomatoes, in the event that you cook them for
quite a while.
Nutritional
values and vitamins the air and sun drying process likewise reduce a
significant part of the wholesome esteem out of food.
The cost of food
dehydration process is comparatively lower than freeze drying method. Since
dehydration refers to drying out foods so it requires less expense to preserve.
Freeze Dried Food Technique
Freeze dried
technique is scientific food preservation technique which is known as “lyophilisation”
or “cryodesiccation”. By using this Freeze Dried Food Technique for food
preservation technique perishable substance of food becomes imperishable and
endures for long term usage and transportation. Freeze drying method involves
four complementary stages for preservation. The first stage is pretreatment
which includes product formulation, ingredient concentration, decreasing high
vapor pressures and increasing surface area prior to freezing foods. The second
stage is freezing. In this stage foods are straightforwardly frozen by
automatic refrigeration or shell freezer. In case of shell freezing foods are
made cool by using dry ice, methanol and liquid form of nitrogen. Usually the
freezing temperature is maintained in between -50◦ C to -80◦ C. This is most
critical stage of freeze drying method because a technical deficiency can harm
foods seriously. Primary drying come after freezing as third step of freeze
drying food preservation technique. In this stage, pressures are reduced and
water substance is sublimated. At least 95% of water of concern food gets
sublimated. Finally in the stage of secondary drying applied object to remove
all unfrozen molecules by increasing temperature higher than the primary drying
stage.
Freeze drying
method is most popular and widely acceptable for preserving foods for
satisfying emergency needs. The reason behind this popularity is that the
tastes and flavors remain unchanged. It keeps food with the natural flavor and
taste for long time duration.
The nutritional
values and vitamins also remain constant as it was earlier of applying freeze
drying technique on the food for preservation.
The costs and
expenses of emergency food storage by freeze drying technique are comparatively
higher than the dehydration technique.
From above arguments and discussion it is proved
that freeze drying is the best method of emergency food storage for using long
timeframe or any emergency situation. Although this process is slightly
expensive but it provides you natural tastes and flavors along with unchanged
vitamins and nutritional values.
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