• EXPERTISE IN CONVENTIONAL FILTRATION Engineered by LPE

  • EXPERTISE IN CONVENTIONAL FILTRATION Engineered by LPE

    Conventional Filtration

    Overview

    Conventional filtration is a traditional water treatment process that removes suspended particles from water by passing it through layers of media such as sand, gravel, or anthracite and activated carbon

    Some of the equipment used to employ these mechanisms has changed dramatically over time. Other systems, such as depth filters, have undergone very little change.

     If a coagulant is added, colloids can be removed at the same time and the range of detained particles increases considerably.

    What is conventional filtration?

    Conventional filtration is a traditional water treatment process that removes suspended particles from water by passing it through layers of media such as sand, gravel, or anthracite and activated carbon

    Some of the equipment used to employ these mechanisms has changed dramatically over time. Other systems, such as depth filters, have undergone very little change.

     If a coagulant is added, colloids can be removed at the same time and the range of detained particles increases considerably.

    Range of effectiveness of the treatment processes

    Range of effectiveness of the treatment processes

    Filtration Theory and Mechanisms

    The following mechanisms describe how impurities are removed by filtration media:

    • Occlusion – Removal due to the impurity particle size being larger than the pore spaces within the filtration media.
    • Adsorption – Removal due to impurities adhering to the surface of the filtration media.
    • Reduction – Removal of free residual chlorine through conversion to chloride ions in the presence of activated carbon media.
    • Oxidation – Removal of iron and manganese through oxidation, precipitation, and subsequent filtration in the presence of greensand media.

    Sand Filters and Multi-Media Filters

    Conventional granular media filtration systems such as sand filters and multi-media filters are widely used for the removal of suspended solids and turbidity in water treatment processes.