Effect of aggregate size and structure on specific resistance of biosolids filter cakes.

Water Sci Technol

School of Civil and Environmental Engineering, The University of New South Wales, Sydney, Australia.

Published: April 2002

Investigation of the specific resistance to filtration of biosolids modified by cationic polymer addition reveals a dependence on both size and structure of the resulting biosolids flocs. This dependence is reasonably described by a modified form of the Carman-Kozeny equation and reveals that effects of differences in floc structure on cake resistance are most marked for flocs of small size. Conversely, effects of differences in floc size are most significant when flocs are more compact.

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