Diy Freeze Dryer
But it can be done.
Diy freeze dryer. Put them inside a plastic bag then sandwich them between two layers of dry ice. At first the food will freeze. I am planning on building a small scale freeze dryer and this is what I have so far as plans.
More on this to come. When the food is ready to go place it on an air-drying rack where the air can fully circulate around the food. But instead of placing the food in a high temp environment you load the racks into a vacuum chamber.
Store Your Food in Air-Free Bag. Would need to be able to heat the food inside for extrafinal drying. A pump removes air from the chamber creating a vacuum.
Prepare some food items that you can use in trying your DIY freeze dryer. By the way dehydrating is a completely different process than freeze drying. If you have a deep freezer make sure the temperature is set to around -30F -34C.
Or even at a larger scale if the budget isnt really there. To an incredible low temp around -40deg F. Then wait for an hour to make the food items frozen solid.
Dynavac has engineered a range of Freeze Dryers capable of all scales of freeze drying from DIY to full production capacity. Freeze fast or use a lower temperature deep freezer. Fundamentally it is not too hard but no one has apparently ever tried it before.