The present invention relates to a method for separating algae, in particular microalgae, from an aqueous phase, having the method steps: a) addition of at least one clay mineral, in particular an alternating-layer clay mineral, to the aqueous, algae-containing phase, and mixing the same, b) sedimentation of the resultant aqueous suspension of algae and clay mineral, forming an aqueous supernatant, and c) separating the sediment of algae and clay mineral from the aqueous supernatant. In addition, the invention relates to a device for carrying out this method.
