Coagulation/flocculation of organic matter in water treatment

0535785 - ÚH 2021 RIV GB eng A - Abstract
Filipenská, Monika - Pivokonský, Martin
Coagulation/flocculation of organic matter in water treatment.
2018.
[UK-IWA Young Water Professionals Conference /19./. 16.04.2018-18.04.2018, Cranfield]
R&D Projects: GA ČR(CZ) GA18-05007S
Institutional support: RVO:67985874
Keywords : AOM (algal organic matter) * cyanobacteria * coagulation * aggregate structure * water treatment
OECD category: Environmental sciences (social aspects to be 5.7)

On the contrary with effect of hydrodynamic conditions on the properties of formed aggregates (Jarvis et al., 2005), the effect of the type of impurity (humic matter, AOM, clay minerals etc.), impurity properties (size of molecules, functional groups, charge density, hydrophobicity etc.) and mutual interaction between different types of impurities and coagulant has been quite overlooked so far. Our previous work (Safarikova et al., 2013) showed that a presence of AOM (or especially Cellular Organic Matter - Proteins, COM) fundamentally influences the coagulation efficiency due to AOM/protein-kaolin interactions and thus, we can assume/believe that characteristics of impurities and their interactions have just as significant effect on aggregate properties as hydrodynamics. Therefore, this work has been focused on the influence of kaolinite particles (that represent turbidity) and COM of cyanobacteria Microcystis aeruginosa on size, structure and shape of aggregates formed by coagulation with two conventional coagulants (ferric and aluminium sulphate). At first, kaolinite and COM were used separately and then simultaneously and they were coagulated under different shear rates. Thus, the effect of single impurities and their mutual interaction on the aggregate properties could be compared.
Permanent Link: http://hdl.handle.net/11104/0313722