Deoxyribonuclease-susceptible Floc Forming Pseudomonas sp.
1981
A bacterium belonging to Pseudomonas which was isolated from activated sludge formed flocs in glycerol-containing medium. The flocs were deflocculated by deoxyribonuclease treatment in the presence of magnesium ions. Flocs were also deflocculated by 2 m NaCl, heating at temperatures higher than 50°C, and at pH below 1 or above 11. The observations suggest that deoxyribonucleic acid is directly involved in the association of cells and that ionic bonds are responsible for the flocculation of cells.
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