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The flocculating activity of bioflocculant from Pseudomonas alcaliphila (B1), Pseudomonas oleovorans subsp. Lubricantis (B2), Pseudomonas chengduensis (B3), and Bacillus nitratireducens (B4) towards kaolin clay suspension. Experiment composition: 180 mL of kaolin suspension (5 g/L), 2 mL of culture broth containing the corresponding bacterial strain (B1, B2, B3, or B4), and 20 mL of CaCl2 solution (10 g/L).
