DOI 10.35776/VST.2021.04.01
UDC 628.161.3:544.77.052.22

Gandurina L. V., Frog B. N., Giro Kristina

Clarification of turbid water with the use of Praestol 650 flocculant

Summary

The efficiency of the individual use of the cationic flocculant Praestol 650 for the purification of turbid water is considered, depending on the turbidity of the source water and the conditions of flocculation. It is shown that the priority parameters that determine the effectiveness of the individual use of the cationic flocculant Praestol 650 for the purification of turbid natural water are the intensity and duration of mixing in the flocculation chamber. With a duration of at least 20 min and an average gradient of mixing rate G = 340 s-1, the efficiency of turbidity reduction is 96% (final turbidity being 7 mg/l). A 96% efficiency of the non-ionic flocculant with a molecular weight of 5–7 million was determined in a suboptimal flocculation mode with a mixing period of 5 min and G = 65 s-1.

Key words

settling , turbidity , flocculation , cationic flocculant , water clarification , mixing rate gradient

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