Freeze-drying is a dehydration process used to preserve food for a long time, without loss of nutrients. The natural texture, color, and flavor of the food are retained.
The freeze-drying process has three stages
- Sublimation drying or Primary drying
- Desorption drying or Secondary drying
During freezing, the water in the food is completely frozen and the ice thus formed undergoes sublimation (it is the direct transition of ice to vapor state without melting) due to reduced pressure, a mild increase in temperature.
In secondary drying, the temperature is gradually increased to remove almost all the water present in the food.
About 95% of the water in the food is removed, during freeze-drying making it a reliable process for food preservation.
Application: Space foods, military rations, coffee, fruit juices, seafood, eggs, and dairy products.
Around the world with food technology
Several food companies around the world provide a great variety of freeze-dried meals that can be of great help during an emergency, and the best part is you don’t have to compromise on nutrition or taste.
Antioxidants for health
Your coffee is filled with antioxidants that can make you active and healthy at the same time. Polyphenols in coffee are responsible for various health benefits.
One cup of coffee a day is just perfect.
A recipe of beaten coffee
3/4 -Tablespoon of instant coffee.
2 – Tablespoon of brown sugar.
1 & 1/2 – Tablespoon of water.
Beat with a fork until your coffee mixture becomes fluffy and light brown, this may take around five minutes. Add a cup of hot milk, stir and enjoy.
Freeze-drying for life
To solve any problem in life, it is very important to completely cool down and take control of your emotions and think about the problem from different perspectives so that you can solve it yourself without any stress.
An interesting piece of information
Astronaut ice cream is a freeze-dried product and their meals are also freeze-dried because these foods have a great shelf life, with a big no to microbial spoilage owing to the least amount of water content in them.
Categories: Food technology