Spray drying and agglomeration
The process of drying takes place in spray dryers. These are 40-metre-high devices, in which the misty extract of coffee fuses with hot air.
The extract, when mixed with the hot air, gradually dries. The water then suddenly evaporates, and ready cereal coffee powder falls to the bottom of the drier.
Bulk density, colour, and humidity are evaluated throughout the entire drying process in an internal lab. This allows for fast parameter modification and optimisation.
The last step in obtaining granulated coffee is agglomeration, a process during which the powder is formed into irregular granules using water vapour.