Modeling of the deep granular bed filtration of nanoparticles

In the case of industrial ultrafine particles filtration by a granular bed, the calculation of the efficiency and the pressure drop evolution is a key step towards the installation design. In this goal, a clogging model based on the expression of a specific area equivalent collector diameter was established. This latter depends on the mass of collected particles and corresponds to the beads diameter of the specific area equivalent clean bed. This approach permits to use the initial efficiency and pressure drop models to forecast the behavior of a granular media during the deep bed filtration phase. This model was validated by comparison with experiments involving collectors and particles of various sizes.