A method for evaluation of suspension quality easy applicable to practice. The effect of mixing on floc properties

0364481 - ÚH 2012 RIV SK eng J - Journal Article
Bubáková, Petra - Pivokonský, Martin - Pivokonská, Lenka
A method for evaluation of suspension quality easy applicable to practice. The effect of mixing on floc properties.
Journal of Hydrology and Hydromechanics. Roč. 59, č. 3 (2011), s. 184-195. ISSN 0042-790X. E-ISSN 1338-4333
R&D Projects: GA ČR GAP105/11/0247
Institutional research plan: CEZ:AV0Z20600510
Keywords : aggregation * drinking water treatment * floc properties * flocculation * test of aggregation
Subject RIV: BK - Fluid Dynamics
Impact factor: 0.340, year: 2011

The paper introduces the test of aggregation as a simple, inexpensive method of evaluating suspension quality during drinking water treatment, suitable for use in both laboratory and operation conditions. The procedure and derivation of the aggregation test is described. The method is used for a demonstration of the influence of mean velocity gradient and mixing time on floc properties formed during the aggregation in a Couette reactor. It was proved that with increasing velocity gradient, the size of the aggregates present in the suspension decreases, and the suspension is substantially more homogeneous than with use of lower gradients. Further, it was confirmed that the size of aggregates reaches the steady state after a specific mixing time, which becomes shorter with increasing value of velocity gradient.
Permanent Link: http://hdl.handle.net/11104/0006554