Influence of velocity gradient on properties and filterability of suspension formed during water treatment

0348208 - ÚH 2011 FR eng A - Abstract
Bubáková, Petra - Pivokonský, Martin
Influence of velocity gradient on properties and filterability of suspension formed during water treatment.
European Conference on Fluid-Particle Separation (FPS2010): Abstracts. Lyon: Société Française des Séparations Fluides-Particules, 2010. s. 85-86. ISBN N.
[European Conference on Fluid-Particle Separation (FPS2010). 05.10.2010-07.10.2010, Lyon]
R&D Projects: GA AV ČR IAA200600902
Institutional research plan: CEZ:AV0Z20600510
Keywords : aggregate size distribution * flocculation * mixing * fractal dimension * filtration * image analysis * water treatment
Subject RIV: BK - Fluid Dynamics

The paper describes the influence of the global velocity gradient G (in range of 28.4 - 307.2 s-1) on the properties of aggregates (size and structure) formed during a coagulation/flocculation process. Further, it describes the influence of mentioned aggregate properties on separation using depth filtration. It was proved that with increasing G, the aggregates became smaller, more compact and regular (the D2 fractal dimension increased) and the suspension became more homogeneous. The aggregates with the smallest diameter and highest D2 fractal dimension displayed the best filterability, i.e. penetrated throughout the full depth of filter bed and generated a minimum pressure drop.
Permanent Link: http://hdl.handle.net/11104/0188795