Search for dissertations about: "Chemical flocculation"

Showing result 1 - 5 of 41 swedish dissertations containing the words Chemical flocculation.

  2. 1. Flocculation in a stirred square tank

    Author : Kalle Pelin; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LDA; square tank; flocculation; particle sizing; CFD; modelling; sliding grid; fluid dynamics;

    Abstract : .... READ MORE

  4. 2. Flocculation with Polyelectrolytes in Latex and Microbial Systems

    Author : Leif Eriksson; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; floc strength; shear sensitivity; fractal dimension; floc structure; patch flocculation; adhesion; bridging; flocculation; charge compensation; adsorption; ionic strength; molecular weight; charge density; Cationic polyelectrolytes; latex; bacteria; activ; Physical chemistry; Fysikalisk kemi;

    Abstract : Adsorption of cationic polyelectrolytes onto polystyrene latices was studied as function of polymer chemical composition and molecular weight, polymer and surface charge density and ionic strength. The ratio between polymer charges and surface charges was close to one when distances between polymer and surface charges were equal. READ MORE

  5. 3. Fluid dynamics and flow structures of wood fibres suspended in gas flows

    Author : Olof Melander; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; two-fluid model; fibres; flocculation; multiphase flow; flow regimes; particle transport; fibre suspensions; Particle Image Velocimetry; Computational Fluid Dynamics; lift force; concentration measurement;

    Abstract : The flow of wood fibres suspended in gas plays a major role in the MDF (Medium Density Fibreboard) production process. Development of machinery in this industry has traditionally been based on experience. Only recently has the use of numerical methods such as CFD (Computational Fluid Dynamics) become an important part of the development process. READ MORE

  6. 4. Modeling in Biomass Harvesting, Biomass Pyrolysis and Producer Gas Cleaning

    Author : Ramiar Sadegh-Vaziri; Matthäus Bäbler; Alessio Frassoldati; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PBE modeling of flocculation; Pyrolysis in Rotary Kilns; Pellet Pyrolysis; Gas Cleaning; Desulfurization.; Chemical Engineering; Kemiteknik;

    Abstract : Biomass is a viable alternative in order to mitigate the environmental effectscaused by the aggressive use of fossil feedstock during the last century.This thesis builds around the idea of a biofuel production process that iscomprised of biomass production, biomass gasication, gas cleaning andfuel production. READ MORE

  7. 5. AKD sizing : dispersion colloidal stability, spreading and sizing with pre-flocculated dispersion

    Author : Rosa Mattsson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

    Abstract : Alkylketene dimer, AKD, dispersions are used in the paper industry to obtain paper grades with a hydrophobic character i.e. resistance to sorption of water. AKD is used in neutral to alkaline internal sizing, pH in the interval of 6-9. READ MORE