Water Supply Vol 6 No 1 pp 39–48 © IWA Publishing 2006
The influence of G and T on the course of aggregation in treatment of medium polluted surface water
S. Mutl*, P. Polasek**, M. Pivokonsky*** and O. Kloucek****
**Institute of Hydrodynamics, Academy of Sciences of the Czech Republic, Pod Patankou 5, 16612 Prague, 6, Czech Republic, (E-mail: mutl@ih.cas.cz)
****Faculty of Engineering, University of Pretoria, Pretoria, 0002, South Africa, (E-mail: polasek@mweb.co.za)
****Institute of Hydrodynamics, Academy of Sciences of the Czech Republic, Pod Patankou 5, 16612 Prague, 6, Czech Republic, (E-mail: mutl@ih.cas.cz)
*****Institute of Hydrodynamics, Academy of Sciences of the Czech Republic, Pod Patankou 5, 16612 Prague, 6, Czech Republic, (E-mail: mutl@ih.cas.cz)
ABSTRACT
This paper summarises the preliminary results from the research into the influence that conditions of agitation have on the progression of the aggregation process and on some of the properties of formed aggregates affecting the efficiency of separation processes. These results show that the applied velocity gradient G, the period of its action T and the distribution of a velocity field in the agitated volume of water influence the number of aggregates, their size and shape in a significant manner. Smaller and denser aggregates of a homogeneous size that are more resistant to breaking up are formed with higher velocity gradient.
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