Dunaliella collection method

The invention belongs to the technical field of alga organism collection, and relates to a Dunaliella collection method. The method comprises the following steps: pumping a Dunaliella culture solution into an upper cylinder via a feed port, starting an upper disk centrifuge and a stirrer, adding a flocculant, cooling the Dunaliella culture solution to inactivate the algae to form an alga floccule which is centralized to a middle cylinder and sinks into the a lower cylinder, opening a drainage port valve to discharge the alga floccule supernate via a drainage port, carrying out initial separation on the Dunaliella and culture solution, gradually concentrating the Dunaliella floccule in the lower cylinder, starting a lower disk centrifuge until the Dunaliella is thoroughly separated from the culture solution, opening a discharge port valve to discharge Dunaliella slurry via a discharge port, diluting with distilled water, carrying out centrifugal dehydration, and cleaning to purify and elute all the salts and flocculant on the Dunaliella surface, thereby implementing Dunaliella collection. The method has the advantages of simple collection technique, high product activity, stable performance, reliable principle, high safety, environment friendliness and high utilization ratio, and is free from the influence of the external environment.