Water Science & Technology: Water Supply–WSTWS Vol 8 No 2 pp 129–134 © IWA Publishing 2008 doi:10.2166/ws.2008.058
Rapid sand filtration of Cryptosporidium parvum: effects of media depth and coagulation
Vitaly Gitis
Unit of Environmental Engineering, Faculty of Engineering Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel gitis@bgu.ac.il
ABSTRACT
Pilot-scale experiments were conducted to investigate the removal of C. parvum by contact granular filtration. The experiments indicated efficient transport of C. parvum oocysts and limitations posed by attachment conditions. The required 99% oocyst removal was achieved during the operable period. Insufficient 95% removal was attributed to a reduced amount of accumulated material at ripening stage. Coagulation, filter depth and run time were found to be important in the removal of C. parvum oocysts.
Keywords: Alum; deep-bed filtration; oocyst; sand filter
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