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FLOTATION AS A STAGE OF CAVITATION-FLOTATION TECHNOLOGY FOR THE TREATMENT OF AQUEOUS HETEROGENEOUS MEDIA FROM DISPERSIVE SOLIDS AND ORGANIC COMPOUNDS

The article presents the results of studies of the flotation stage of the combined cavitation-flotation technology for the treatment of aqueous heterogeneous media from dispersed solid particles and organic compounds. The synthesis of processes of cavitation and flotation is proposed to be implemented in a combined apparatus of a column type. The rational limits of pressure change at the entrance to the cavitator (0.3–0.4 MPa) were found to provide effective flotation. It was established that at such pressure values a film-structural foam with averaged radius of a flotation bubble of 1,8 mm is formed and the average gas flotation layer of 0.05 m 3 /m 3 is formed. It is noted that the maximum velocity of flotation of calcium oxalate (13.2·10 -4 kg/(m 3 ·sec)) corresponds to the range of the duration of cavitation treatment 600–900 sec.