Dehydrated fruits, vegetables and meat items are getting famous among most of the people. Therefore these products create a huge market all around the world. Therefore it is good to know about dehydration process and various methods that can be used to dehydrate food products.
Sun drying
This is the general
practice since many years. Still in most of our home we used to dry things using this sun drying method. Sun drying is very effective in places with long
periods of hot sun specially countries near to equator. Also anywhere with a minimum
temperature of 28 – 30 C with less relative humidity is suitable. Normally
foods take several days to dry thoroughly. Place on a mesh screen and cover
with a second screen to protect from dirt and animals.
Air drying
Same as sun drying, air
drying is also a common practice of dehydrating foods. The main difference is
that air drying usually takes place in the shade. This is suitable for foods
which need less heat to dry such as leaves and herbs.
Solar drying
An advance method of
sun drying. Since there are no heaters or fans to circulate the air, solar
drying uses zero electricity. Solar dryers work outdoors and can be designed as
per the required size, and shape.
Oven drying
Your home oven can be
used to slowly dry food at temperatures around 60 C. Normally ovens are designed
for higher temperature applications. However you can use this method for some home made
quick dried foods. Make sure to maintain temperature around 60 C or below. Otherwise
foods will be cooked instead of drying.
Dehydrators
With the market
advancement of dehydrated food, special appliances were designed for commercial
dehydration purpose. These dehydrators equipped with fans and elements to
quickly and efficiently dry your food. These dehydrators can be powered with
electricity, Gas, Kerosene, wood or any other method.
Dehydrating in a
microwave oven
If you have a small
amount of food to dehydrate, you can consider using your microwave set on
‘defrost’ to dry fruits and herbs. In general, microwaved fruits will take 20
to 40 minutes to dry fully, but keep checking on them so you don’t overdo it.
If you are planning to make lot of dehydrated foods it is advisable to find a commercial dehydrator with more surface area as the amount of time take to dehydration process is anywhere from 5 to 14 hours. Properly packed, dehydrated fruits can last up to five years and vegetables up to ten. If you are going to consume non-meat items within a year, keep them in freezer bags or reusable storage bags with the air squeezed out. For long-term preservation, vacuum packing is the best.