Unit operations such as centrifugation and microfiltration may be preceded by flocculation to improve the efficiency of recovery [21]. Flocculants can improve dewatering characteristics during centrifugation and fil tration because of their binding capabilities. Flocculants can help to maintain cellular properties when the culture experiences high shear forces during processes such as centrifugation [3]. Multi-stage dewatering processes have the potential to significantly reduce the energy consumption involved with large-volume cultures. It is estimated that bio­mass recovery contributes up to 20-30% of the total biomass production cost [12]. Therefore, multi-stage dewatering processes have the potential to reduce the eco­nomics involved with biomass production.