The effect of impeller type and shear rate on the evolution of floc size and structure during shear-induced flocculation of polystyrene particles with aluminum sulfate is investigated by image analysis. One radial flow (six-blade Rushton turbine) and two axial flow (three-blade fluid foil, four-blade 45° pitch) impeller configurations are examined. The steady state average floc size is show...

In this work, we study a model of the chemostat where the species are present in two forms, isolated and aggregated individuals, such as attached bacteria or bacteria in flocks. We show that our general model contains a lot of models that were previously considered in the literature. Assuming that flocculation and deflocculation dynamics are fast compared to the growth of the species, we constr...

Title of Document: MODELING THE IMPACT OF SEDIMENT RESUSPENSION AND FLOCCULATION ON THE FATE OF POLYCHLORINATED BIPHENYLS. Chihwei Chang, Doctor of Philosophy, 2008 Directed By: Professor Joel E Baker, University of Maryland, Chesapeake Biological Laboratory Hydrophobic organic contaminants (HOCs) are important pollutants in urban estuaries. HOCs include polycyclic aromatic hydrocarbon (PAH), p...

the opuntia ficus indica mucilage was an abundant and a low cost product. in the presentpaper, it was tested as an eco-friendly flocculants for textile waste water treatment. its performance asflocculants in decolorization, cod removal and turbidity abatement was checked. the natural product wascharacterized using uv-vis and infra-red spectroscopy. the study of the effect, followed by an optimi...

BACKGROUND Production of biofuels from microalgae has been recognized to be a promising route for a sustainable energy supply. However, the microalgae harvesting process is a bottleneck for industrialization because it is energy intensive. Thus, by displaying interactive protein factors on the cell wall, oleaginous microalgae can acquire the auto- and controllable-flocculation function, yieldin...