Magnetic-seeding filtration

Magnetic-seeding filtration consists of two steps: heterogeneous particle f locculation of magnetic and nonmagnetic particles in a stirred tank and hig h-gradient magnetic filtration (HGMF). The effects of various parameters af fecting magnetic-seeding filtration are theoretically and experimentally in vestigated. A trajectory model that includes hydrodynamic resistance, van d er Waals, and electrostatic forces is developed to calculate the flocculati on frequency in a turbulent-shear regime. Fractal dimension is introduced t o simulate the open structure of aggregates. A magnetic-filtration model th at consists of trajectory analysis, a particle build-up model, a breakthrou gh model, and a bivariate population-balance model is developed to predict the breakthrough curve of magnetic-seeding filtration. A good agreement bet ween modeling results and experimental data is obtained. The results show t hat the model developed in this study can be used to predict the performanc e of magnetic-seeding filtration without using empirical coefficients or fi tting parameters.