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AWWA MTC69779
- The Use of Flow-Field Flow Fractionation as a Process Control Tool for Membrane Filtration in Water Treatment
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
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This paper discusses two methods for predicting filtration characteristics of a given feedwaterwith a given membrane in the application of dead-end ultrafiltration. The first method aims todetermine the critical flux for irreversibility; the flux below which fouling built up duringfiltration is completely removed by backwashing. The critical flux and filtration behavior ingeneral, were strongly influenced by the presence of an electrolyte in the solution. The secondmethod is flow field-flow fractionation (flow FFF) coupled with multi-angle light scattering. The study demonstratesthat flow FFF can be used to determine particle-membrane interactions and particle sizeand molar mass distributions of a complex, model solution. The results of flow FFF were usedto explain the filtration results obtained with the critical flux method for the sodium alginatein the presence and absence of salt. Includes 8 references, figures.
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