freeze drying

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freeze drying

[′frēz ‚drī·iŋ]
(engineering)
A method of drying materials, such as certain foods, that would be destroyed by the loss of volatile ingredients or by drying temperatures above the freezing point; the material is frozen under high vacuum so that ice or other frozen solvent will quickly sublime and a porous solid remain.
References in periodicals archive ?
M2 EQUITYBITES-September 4, 2019-Delta enters into partnership with Thai Freeze Dry for expansion into the nutraceutical market in Asia
Global Banking News-September 4, 2019-Delta enters into partnership with Thai Freeze Dry for expansion into the nutraceutical market in Asia
Be capable of freeze dry 2 liters or more of material per batch.
It is perfect to freeze dry food that would otherwise go to waste so that it can be used as a meal in a few weeks or to be eaten in 25 years.
"They basically freeze dry you, hit you with a hammer and you break into dust."
"This requires lots of energy and equipment," Giestas says, "so the cost is much higher than for spray-dried, which is processed using a vertical tower." But the spray dry process, even though it costs substantially less than the freeze dry process, "has improved dramatically." Giestas opines that "spray dried has kept pace with freeze dried, especially in terms of variety of flavors since each change in the spray dry process yields a change in the taste of the product." He adds that with aroma recovery technology "we can change the entire taste profile of our product."
"The first freeze-dried product was a strawberry created for cereals," says Herb Ashkenazy, president of Oregon Freeze Dry, Albany, Ore.
For just this reason, Munters' Moisture Control Services division has developed its Accelerated Vacuum Freeze Dry System, which restores water-damaged materials quickly and effectively.
With changes made to freeze dry technologies, Griffin notes that there is always room for improvement with temperature distribution within shelves.
FreeZone personal-sized 1- and 2.5-L freeze dry systems offer a CFC-free refrigeration system in which the collector coils to -50 C (-58 F).
The freeze dry cycle is shortened because moisture does not have to migrate through the ice interface and a thick layer of already dried product.
You may have to develop a freeze dryer where historically you never had any of that and now the user wants to freeze dry cytotoxic drugs with some type of barrier isolation along with ability to wash out anything inside."