Accession Number : ADP009028

Title :   Optical Absorption Technique in the Study of Membrane Filtration Processes,

Corporate Author : TECHNICAL UNIV OF DENMARK LYNGBY

Personal Author(s) : Larsen, P. S. ; Christensen, E. M. ; Nielsen, N. F.

Report Date : 23 JUL 1992

Pagination or Media Count : 6

Abstract : The mass transfer experiments employ a dyed solute in water, a transparent membrane on one wall of a cell or a plane flow channel, and transparent walls. Measurements of the attenuation of a collimated beam of light give quantitative information of the concentration boundary layer formed adjacent to the membrane, in terms of the integrated concentration distribution. The technique is verififed against numerical predictions for the transient one-dimensional diffusion-convection problem in a dead-end filtration process in the closed cell. It is then applied to the steady two-dimensional problem of cross-flow filtration in the flow channel. Here, the socalled striping phenomenon is also quantified. (Author)

Descriptors :   *MEMBRANES, *FILTRATION, ABSORPTION SPECTRA, MASS TRANSFER, CELLULOSE ACETATES, WATER ANALYSIS, QUANTITATIVE ANALYSIS, FLOW FIELDS, DEXTRAN, EXPERIMENTAL DATA, COMPARISON, DENMARK, BOUNDARY LAYER, CONCENTRATION(COMPOSITION), SOLUTIONS(MIXTURES), CHANNEL FLOW, SOLVATION, DIFFUSION.

Subject Categories : Fluid Mechanics
      Biochemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE