Aeration for Fouling Control in Submerged Membrane Bioreactors for Wastewater Treatment: Shear Simulation and Experimental Validation

2012 
Aeration for fouling prevention in SMBRs represents a great part of energy consumption of the process. To decrease it a better understanding of the impact of aeration on filtration performances is required. In spite of its beneficial effect (shear stress on membrane surface, turbulences...), the aeration has an impact on a potential destructuration of mixed liquor that could be detrimental to filtration. Our study aims at estimating this impact for SADm and SADp close to those used in full scale plants. To do so work was separated in two main parts: 1) Hydrodynamics characterisation to quantify shear stresses imposed to mixed liquor through Computational Fluid Dynamics (CFD) simulations 2) A pilot campaign to assess experimentally the impact of aeration on mixed liquor parameters. The aim is to link air flowrate (operational parameter) to fouling through local mechanism induced by aeration: shear stresses imposed to mixed liquor and the induced variations of floc size and Extracellular Polymeric Substances (EPS) concentrations.
    • Correction
    • Source
    • Cite
    • Save
    • Machine Reading By IdeaReader
    0
    References
    1
    Citations
    NaN
    KQI
    []