Depressed filtration ripening enhances removal of Cryptosporidium parvum

V. Gitis, R. C. Haught, R. M. Clark, E. Radha Krishnan

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Pilot-scale experiments were conducted to investigate removal of Cryptosporidium parvum by contact granular filtration. The research demonstrated enhanced removal of Cryptosporidium parvum in the presence of kaolin particles. This is believed to be due electrostatic adhesion of Cryptosporidium parvum oocysts to the kaolin clay particles. The elementary physico-chemical interactions between filter granules and suspension particles will be discussed. This innovative concept was successfully implemented to reduce the ripening sequence of subsequent filtration experimental test runs by the addition of large surface area particles to slurry of kaolin and Cryptosporidium parvum in surface water.

Original languageEnglish
Pages (from-to)159-166
Number of pages8
JournalWater Science and Technology: Water Supply
Issue number3
StatePublished - 1 Jan 2002
Externally publishedYes


  • Contact granular filtration
  • Cryptosporidium parvum
  • Ripening
  • Sand filter

ASJC Scopus subject areas

  • Water Science and Technology


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