METHOD FOR CROSS FLOW MICROFILTRATION OF MICROALGAE IN THE ABSENCE OF FLOCCULATING AGENTS

摘要

A process for dewatering the alga Dunaliella salina in brine is disclosed for the recovery of mixed carotenoids. The algal cells are ruptured. The brine is pumped in the absence of any added flocculating agents across a microporous filtration membrane having an absolute rating of about 10 microns or less. A retentate is generated that has an increased concentration of the algae and mixed carotenoids relative to the brine. A permeate is generated of brine that is substantially free of mixed carotenoids. Diafiltration steps may be performed to adjust the salt and carotenoid concentration in the retentate.