Fig. 5. Characteristics of Chlorella sp. FC2 cell morphology revealed by SEM/EDX: (A) before flocculation; (B) after flocculation using FeSO4. (C) Zeta potential of the microalgal culture for the fresh biomass before harvesting, treated biomass after harvesting, and treated non-flocculated biomass after harvesting. The harvesting experiment was carried out at an F/X ratio of 2.5 and harvesting time of 50 min.
