The effect of initial medium pH on fungi–algae pellets formation
was further investigated since pH was considered as another
important factor for pellet formation. The pH of culture broth
was adjusted ranged from 4.5 to 7.0 by 1 M H2SO4. It was observed
that the speed of fungi–algae pellet formation was faster in the
medium with lower initial pH value (Table 2b), which further
confirmed our earlier conjecture. In order to confirm that algae