even if surface charges are neutralized, the flocculation process cannot occur unless some additional coagulants are added in order to precede the sweep coagulation (10).
When the chlorophyll a and TSS concentrations were high, the destabilization of colloids could also performed by surface adsorption thus the precipitation of these solids would be accomplished in a short time. Besides,
higher concentrations of algae and TSS increase the possibility of interactions between particles, thereupon a better coagulation would result at these conditions.