A fluidized layer of granular material used for the separation of particulate impurities in drinking water treatment

0360312 - ÚH 2012 RIV SK eng J - Journal Article
Pivokonský, Martin - Bubáková, Petra - Hnaťuková, Petra - Knesl, Bohuslav
A fluidized layer of granular material used for the separation of particulate impurities in drinking water treatment.
Journal of Hydrology and Hydromechanics. Roč. 59, č. 2 (2011), s. 95-106. ISSN 0042-790X. E-ISSN 1338-4333
R&D Projects: GA AV ČR IAA200600902
Institutional research plan: CEZ:AV0Z20600510
Keywords : aggregation * destabilization * fluidized layer * separation * water treatment
Subject RIV: BK - Fluid Dynamics
Impact factor: 0.340, year: 2011

The paper deals with the application of a fluidized layer of granular material (FLGM) for the direct separation of impurities in drinking water treatment. Further, it investigates the effect of operation parameters (grain size, arrangement, velocity gradient, dose of destabilisation reagent and temperature) on the aggregation (α) and separation efficiency (φ) of FLGM. The highest φ was achieved, when the particles entered FLGM immediately after the dosing of the destabilisation reagent, when they had the lowest degree of aggregation. The maximal value of φ was reached at G~250 s^-1 The highest value of φ(Al) was achieved at T=5 °C, but the effect of T on φ(TOC) was not very significant. The maximal separation efficiency reached the values φ(Al)=0.81 at the optimal dosage D(Al)=1.55 mg/L and φ(TOC)=0.31 at the dosage D(Al)=2.36 mg/L. The separation of impurities proceeded via their interception on the FLGM grains in a form of solid, water-free shell (ρ=2450 kg/m³).
Permanent Link: http://hdl.handle.net/11104/0006480