We have used continuous flow centrifugeso (als called flow-through centrifuges) or tangetial flow systems to harvest large volumes of algal culture (up to 100l of various microalgae but not Dunaliella). Both methods work very well but are quite time and energy consuming. I would think that both methods work also for Dunaliella

Hi Burkhard,

Thank you for your reply .... but Dunaliella always accumulate lipid due to stress conditions which make it float on the culture surface or in field wild life

Thanks again

For a buoyany species like Dunaliella would a cream separator work? I remember seeing a hand-operated one working on a relatives farm when I was a kid.

@Raymond, indeed , we have used an almost-antique Sharples tubular cream separator to concentrate microalgal harvests. To facilitate removal of the separated algae, we curl a piece of mylar plastic within the chamber before running the machine, then we slide the plastic sheet with the algae out and squeegee the algal paste off the surface of the plastic outside of the machine.

We usually use cream separator for Spirulina harvesting in our lab but for Dunaliella with its saturated saline medium i didn't tested it before !

Hi, If you can use some salts like MgCl2 or AlCl3, Dunaliella cells would be aggregate because of having positive charge of Mg2+ or Al3+.

Cooling Dunaliella cells to 4 degree in centigrade or may be a little bit less also cause to precipitate the cells down the container. Hope these work, however they are not industrial methods..

If I have some questions about spirulina platensis alga during my work, can I ask you?

Thanks

what about phytoplankton net, did you try it?

See this link: http://www.evodos.eu/index.php/equipment/evodos-10.html