MACROCOLLOIDAL TRANSPORT IN MEMBRANE FILTERS IN SLOW LAMINAR FLOWS - POLARIZATION CHROMATOGRAPHY Conference Paper

abstract

• 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.

authors

• Chellam, Shankararaman

published proceedings

• WATER SCIENCE AND TECHNOLOGY

author list (cited authors)

• CHELLAM, S., & WIESNER, M. R.

citation count

• 1

complete list of authors

• CHELLAM, S||WIESNER, MR

publication date

• November 1992

publisher

• IWA Publishing  Publisher

published in

• Water Science and Technology  Journal

keywords

• Advanced Waste-water Treatment
• Back-transport
• Concentration Polarization
• Convection
• Cross-flow Filtration
• Diffusion
• Initial Deposition
• Macrocolloids
• Polarization Chromatography
• Residence Time Distributions

Digital Object Identifier (DOI)

• 10.2166/wst.1992.0715

start page

• 2277

end page

• 2280

volume

• 26

issue

• 9-11

URL

• http://dx.doi.org/10.2166/wst.1992.0715