Purification and Application of the Microbial Flocculants

The microbial flocculants are produced by the Pseudomonas sp, which is isolated from the activated sludge. The flocculants are extracted from culture broth using organic solvent. The optimal conditions of purification and flocculation are studied. According to flocculating tests, the flocculants are well characterized by its ability to get rid of suspended material in water and to decolourize the high - density dyestuff wastewater under certain temperature and pH value. When the flocculants are used in the petrochemical wastewater treatment, the COD removal ratio is 16.8% , and the colority removal ratio is 10.0%. During dye wastewater treatment, the COD removal ratio is 15. 2% , and the colority removal ratio is 10. 2%.