Important note: I’ve never seen a freeze dryer in stock at any Walmart I’ve been to, and they aren’t always available online.
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Commercial freeze dryers are much easier to find than industrial or laboratory freeze dryers as they’re made for the service industry and some manufacturing sectors.
I'm brainstorming ideas on what to do with it. Gourmet astronaut ice cream? Crispy cheesecake? Some weird variant on beef jerky?
Gas fryers and gas stoves are typically in commercial kitchens because they generate much more power. Overall, this range of commercial range has less components and can be easier to maintain and undergo less commercial repair.
Remove all ice every 8 hours of drying time. It is amazing how much faster the drying time drops doing this. A side benefit is water vapor does not contaminate the oil as fast. I've gotten up to 20 cycle per oil change by carefully monitoring the oil and water.
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The two sub-processes, freezing and vacuum drying are done correctly: The freezing process must be quick and the vacuum process should leave only residual moisture.
Lastly, don’t forget about finding a used freeze dryer on craigstlist.org or other similar classified-based websites. There are plenty of used and well-kept freeze dryers out there that you can get for half the price.
Many online stores (taking Harvest Right as an example) have sections of their websites devoted to all the different benefits of using freeze dryers, explaining how to freeze dry, how it affects nutrition, and all other additional info you may need.
With simple-to-use dial controls and straightforward cycles, It truly is an excellent decision for those who dislike fidgeting with buttons and configurations.
Obviously things like ice cream and marshmallows you would want to let the freeze cycle run longer. When I'm ready to start the drying cycle, I open the door, remove the insulator, and check the temperature of the food on the trays with an infrared thermometer. As long as it's below -10F I start the dry cycle. A side note for TonyC, have you ever thought about attaching a mirror to each side of the tray rack to reflect the radiant heat back in to the trays? I've looked at some mirror finish stainless on ebay, and it looks like you could do it for about $40. Not sure if it's worth a try or not. I Buy Now would think it would let you get more water out in a cycle because the radiant heat wouldn't be warming the ice on the chamber walls. Just a thought.... Edited December 16, 2015 by Pipsqueak duplicate post (log)
You can also use Facebook Marketplace or specialty groups to find used freeze dryers, but most people will list them in specialized stores because that’s where most people will be looking.