Schematic presentation of microalgal production and processing.
Schematic diagram of a simple tangential flow filtration system. The microalgal culture and recycled retentate are pumped from the feed tank to the filtration module. The filtrate carries onto the next step of the process, while the retentate is returned back to the feed tank.
A conventional dissolved air flotation unit (Ref. 44). The microalgae culture flows continuously through the unit. Flocculants are added and with mixing induce microalgal flocculation. The flocculated microalgae reach the flotation cell where a recycled stream of water is used to introduce dissolved air into the system.
Schematic diagram of electrolytic flocculation unit. The negatively charge microalgal cells are attracted to the positive electrode, where, upon contact, they neutralize in change and form aggregates.
Different flocculants and their optimal dose and for microalgal flocculation (Ref. 7).
Summary of the performances of different harvesting and dewatering techniques.
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