The present invention relates to the granules of production of biomass of microalgae rich in proteins characterized in that they have: ∘ a particle size distribution measured on a laser granulometer of coulter ls ®, with a dmode between 60 and 300 μm and a d4,3 between 70 and 420 μm) an aerated density, measured on powder characteristics be tested, hosokawa, between 0,60 and 0,70%,) a compressibility, measured on powder characteristics be tested, hosokawa, between 15 and 25%, preferably between 18 and 21 %.
