Ever
since the dawn of time, people have tried to find ways to ensure that food
remains safe to store and consume for the longest possible time. In the last
few years, the revolution in long term food storage has been let by the process
of Lyophilization. In this process, the food is frozen below its triple point
and then dried through vacuum process to extract all moisture from food and
disperse it elsewhere. This process is done to kill all bacteria and other
microbes present in the food item. Once all the microbes are destroyed, the
food spoilage process slows down to such an extent that it can be stored safely
for very long duration of time.
Three
Step Process:
·
The first step in the
process is to freeze the product at a very fast pace. Yatherm freeze dryer is specially prepared to
ensure that no ice crystals are formed in the food which may risk insufficient
drying activity.
·
The second step is to
expose the item to a vacuum which is placed below the triple point of water to
extract any moisture which may be left after the freeze steps. This leads to
moisture becoming consolidated which is then ready for the next step.
·
Finally, the material is
dried out through sublimation which leads to all the consolidated moisture
content being sucked out of it and dispersed elsewhere.
Key
Features of Freeze Dryer:
Freeze dryer equipment
is designed to be extremely user friendly. The device is equipped with digital
PID controller and multiple validation ports. No CFC or HCFC is used in
refrigeration to ensure that environment is not impacted at all. The devices
have the capability to operate from below -40°C or -110°C temperature and
operate in single and dual stage cooling. Devices are available in different
ice capacities from 2 to 50 litres.
The machines are fitted with Temperature, pressure and time control system and handles both primary and secondary drying steps with ease. The body is built to resist any kind of corrosion. The display panel is also equipped with an audio-visual alarm system on its display panel for single point monitoring..
The Future of The Freeze Dryer:
The
food industry has a bright future because despite all scientific process, there
is no alternative to eating and many food items need to be shipped and stored
for a long duration. Similarly, with growing economic power of people, choice
and quantity of food demand is also expected to grow exponentially. People are
looking for more internationally available food items and a global culinary
palette is emerging.
This
can only be satisfied by freeze dryers which will allow long storage and
shipping of food. Lyophilization is a mature technology and can be scaled and
adopted very rapidly. It has minimal impact on taste, shape, colour and texture
of the food. Yatherm freeze dryer is a cost effective and highly durable
product ready to match the growing demand of such products all over the globe.
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