Anti-adhesion culture medium

A process for culturing microorganisms in a culture medium suitable for their growth, wherein the culture medium comprises between 50 mg/L and 450 mg/L of a flocculating agent during a culture phase to prevent adhesion of the microorganisms to the walls of the reactors in which the culture is carried out, the microorganisms being microalgae of the genus Chlorella, and the flocculating agent being selected from iron chloride and zinc chloride;

• and wherein the culture is a long-term culture of at least 50 hours.