Lignin particles can be retained in depth filters composed of cellulose fibers and clay materials. Experimental results of separation capacity and efficiencies are correlated to physical variables such as suspension concentrations, flow rates and surface chemistry.
Colloid Filtration Theory applies microscale flow models to describe the deposition process in terms of fluid hydrodynamics, colloid/surface properties, and colloid-surface interactions. By relating the single collector efficiency to the adsorption rate constant, the magnitude of the macroscopic parameter is related to the microscopic forces dictating the deposition process. To build upon the insight gained from microscale porous media models, 3D models are used to predict and compare with experimental results of capacity and efficiency.
