Fig. 4. Effect of the flocculant on the culture broth, cell morphology and cell viability. The left-hand side panel and right-hand side panel represent the states before and after harvesting with FeSO4. (A and B) algal culture broth; (C and D) cell morphology under a brightfield microscope (100× magnification); (E and F) cell morphology under FESEM (8k magnification); and (G and H) cell viability assessed through flow cytometry analysis. The harvesting experiment was carried out at F/X of 2.5 and harvesting time of 50 min.
