Title: Polymer dose effects on filtration followed by expression of clay slurries
Authors: Chang, IL
Chu, CP
Lee, DJ
Huang, C
Institute of Environmental Engineering
Keywords: expression;filtration;polymer conditioning;creep effect;zeta potential
Issue Date: 15-Jan-1997
Abstract: Filtration followed by expression characteristics of cationic polymer conditioned clay slurries are reported for the first time in this work. As the polymer dosage increases, the resistance to filtration greatly decreases until a specific dose has been reached, where the zeta potential is close to zero. And further increase in polymer dose conversely raises the resistance. The expression data are interpreted by the Terzaghi-Voigt combined model, from which the model parameters are evaluated. The polymer conditioning has only a mild effect on the primary consolidation process but has, however, a considerable influence on secondary consolidation characteristics. When zeta potential changes from negative to positive, both the easiness of creeping of constituent particles within the sludge cake and the fraction of moisture removal by the secondary consolidation attain a maximum., The optimal polymer dose criterion considering the filtration and expression stages separately, or in combination, is (sic). (C) 1997 Academic Press
URI: http://dx.doi.org/10.1006/jcis.1996.4582
ISSN: 0021-9797
DOI: 10.1006/jcis.1996.4582
Volume: 185
Issue: 2
Begin Page: 335
End Page: 342
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  1. A1997WD50200008.pdf