Cake compressibility of silica colloids in membrane filtration processes

Gurdev Singh, Lianfa Song

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Compressibility of colloidal cakes, which plays an important role in many engineering processes including deep-bed and membrane filtrations, is dependent on the properties of the colloidal particles and is affected by water chemistry. In this article, the compressibility of silica colloids was investigated by performing fouling experiments on a bench-scale ultrafiltration system. It was demonstrated that the cake compressibility of the deposited colloids on the membrane surface could be quantitatively related to the fouling potential of the colloidal suspension, which avoided the difficulty of measuring the specific cake resistance. Ionic strength was found to strongly influence the compressibility of the colloidal cakes. A linear relationship was found relating the cake compressibility to the natural logarithm of the feedwater ionic strength.

Original languageEnglish
Pages (from-to)7633-7638
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume45
Issue number22
DOIs
StatePublished - Oct 25 2006

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