Chemical coagulation is performed by making the mixture of chemicals for initia­tion of flocculation in the fusion of algae. The mixture of chemicals includes inorganic flocculants and organic flocculants or poly-electrolyte flocculants. The activity of two predictable chemical coagulants (FeCl3 and Fe2 (SO4)3) and five commercial polymeric flocculants (Drewfloc 447, Flocudex CS/5000, Flocusol CM/78, Chemifloc CV/300, and Chitosan) was matched by de Godos et al. (2011) to check their capability to eliminate bacterial biomass in algae from the dis­charge of a photosynthetically oxygenated piggery wastewater biodegradation process. Ferric salts achieved the uppermost biomass elimination (66-98 %) at the absorption of 150-250 mg/L. Polymer flocculants were considered sufficient for the similar elimination efficacies and eliminated the bacterial biomass at lower concentration (25-50 mg/L), though the efficiency reduced at upper polymer floc — culants amount.