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US 10,864,457 B2Granted
Spray freezing
AssigneeChr. Hansen A/S
InventorsMichelle Madsen, Allan Jensen, Hans Bisgaard-Frantzen
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Abstract
The present invention relates to an improved method for preservation of e.g. microorganisms, especially lactic acid bacteria, said method includes spray freezing.
Claims26
A process for removing liquid from a solution or suspension containing microorganisms, comprising:
- (a) preparing droplets of a solution or suspension containing microorganisms by spraying the solution or suspension;
- (b) spray-drying the droplets by contacting the droplets with a drying gas;
- (c) freezing the droplets obtained in step (b) with a cryogenic gas to obtain a frozen product;
- and
- (d) freeze-drying the frozen product under reduced pressure to a water activity (aw) below 0.20, to produce a freeze-dried product.
2 more elements
Dependencies are inferred from the claim text.