The effect of aluminium coagulants composition and mixing conditions on characteristics of dispersions formed
Abstract
The effect of industrial aluminium coagulants' composition and stirring intensity on characteristics of coagulates formed by hydrolysis, has been studied. Coagulates diameter and sedimentation rate have been established to be proportional to the aluminium polymeric species content in the coagulant, which is determined by its initial chemical composition. Formation of large coagulates has been shown to take place more rapidly at stirring intensity with velocity gradient value equal to 40 s-1 (150 rpm). Both decreasing (to 9 s-1, 50 rpm) and increasing (to 210-370 s-1, 500-750 rpm) of stirring intensity led to coagulates' size decrease and their growth rate reduction.
About the Authors
A. V. Zyhmant
Research Institute for Physical Chemical Problems of the Belarusian State University
Belarus
Belarus
T. A. Savitskaya
Research Institute for Physical Chemical Problems of the Belarusian State University
Belarus
Belarus
N. G. Tsygankova
Research Institute for Physical Chemical Problems of the Belarusian State University
Belarus
Belarus
D. D. Grinshpan
Research Institute for Physical Chemical Problems of the Belarusian State University
Belarus
Belarus
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