Disclosed is a spray-
freeze drying (SFD) apparatus for continuous
drying of microalgae. The apparatus includes a main chamber connected to a collector chamber and a compressor, designed to freeze fine droplets of microalgae and collect frozen particles. A
drying chamber, positioned downstream of the main chamber, is coupled with a
vacuum pump and an
electromagnetic radiation source to remove
moisture from the frozen microalgae, resulting in dried particles. The dried microalgae are then collected in a designated collection chamber. Additionally, a method is disclosed for continuous
drying of microalgae using the SFD apparatus. The method involves spraying microalgae suspension as fine droplets towards a cold surface particle collector in the main chamber, freezing and collecting the particles, transferring them to the drying chamber, and removing
moisture through the activation of the
electromagnetic radiation source and
vacuum pump, followed by collecting the dried microalgae in the collection chamber.