SubnetUnMask
Jedi
Lot's of good information in this thread.
To add, if you have the financial resources, there are now residential Freeze Dryer machines available from one vendor, Harvest Right. Cost in the USA range from $2200-3300 for a home unit. Freeze drying works by first freezing the food, then lowering the air pressure within the freezing chamber - this changes the evaporation temperature of water. After this is done, heating elements are used to heat areas near the food, which causes the frozen water in the food to turn into a gas without going into a liquid form. The gas is then sucked out. Eventually, there is no moisture left in the food. You can seal the food in mylar bags, and throw in an oxygen absorbing packet. This removes all moisture, oxygen, and sun light from the food. Freeze dried food can last up to 25 years when stored properly. Freeze dried food also retains the highest amount of nutritional value compared to canning and dehydration.
I ended up buying one a few months back when the grocery store shelves in my area were turning up bare. I have the smallest unit they sell - it weighs about 70 lbs, and the pump is another 40 or so. Freeze drying a batch of food takes about 20-24 hours, and the standard pump is pretty damn loud (though there is quieter pump for sale). You have to filter the oil every 4-5 batches. So far I've just been freeze drying meat + veggie meals. I have yet to try one though. My thought process, is you can open a mylar bag, add very hot water to heat and reconstitute the already cooked food, and you're good to go.
To add, if you have the financial resources, there are now residential Freeze Dryer machines available from one vendor, Harvest Right. Cost in the USA range from $2200-3300 for a home unit. Freeze drying works by first freezing the food, then lowering the air pressure within the freezing chamber - this changes the evaporation temperature of water. After this is done, heating elements are used to heat areas near the food, which causes the frozen water in the food to turn into a gas without going into a liquid form. The gas is then sucked out. Eventually, there is no moisture left in the food. You can seal the food in mylar bags, and throw in an oxygen absorbing packet. This removes all moisture, oxygen, and sun light from the food. Freeze dried food can last up to 25 years when stored properly. Freeze dried food also retains the highest amount of nutritional value compared to canning and dehydration.
I ended up buying one a few months back when the grocery store shelves in my area were turning up bare. I have the smallest unit they sell - it weighs about 70 lbs, and the pump is another 40 or so. Freeze drying a batch of food takes about 20-24 hours, and the standard pump is pretty damn loud (though there is quieter pump for sale). You have to filter the oil every 4-5 batches. So far I've just been freeze drying meat + veggie meals. I have yet to try one though. My thought process, is you can open a mylar bag, add very hot water to heat and reconstitute the already cooked food, and you're good to go.