Particle transport in crossflow membrane filters is the result of complex interactions originating from module hydrodynamics, suspension chemistry and external forces. Experimental and theoretical investigations of particle transport in dilute suspensions were conducted in a laboratory model membrane filter to understand fundamental aspects of macrocolloidal transport. Particle residence time distributions (RTDs) were obtained experimentally under varying hydrodynamic conditions in the filter by making pulse inputs. Under conditions of laminar flow, particle transport can be divided into two regimes: convection dominated and diffusion dominated. Convective transport is described quantitatively by theories of particle mechanics as evidenced by correlations presented regarding the first passage time as well as the peak response. Diffusive transport is demonstrated by multiple peaks in the RTDs under existing experimental conditions. Understanding these transport processes can lead to a more rational design, selection and operation of membrane systems and pre-treatment options.
Skip Nav Destination
Research Article| November 01 1992
Macrocolloidal Transport in Membrane Filters in Slow Laminar Flows: Polarization Chromatography
Water Sci Technol (1992) 26 (9-11): 2277–2280.
S. Chellam, M. R. Wiesner; Macrocolloidal Transport in Membrane Filters in Slow Laminar Flows: Polarization Chromatography. Water Sci Technol 1 November 1992; 26 (9-11): 2277–2280. doi: https://doi.org/10.2166/wst.1992.0715
Download citation file: