Inactivation of Cryptosporidium parvum oocysts with sequential application of ozone and combined chlorine
J L Rennecker1, B Corona-Vasquez, A M Driedger
1Dept of Civil and Environmental Engineering, University of Illinois, Urbana, IL 61801, USA.
Abstract:
Single-step inactivation experiments with ozone and monochloramine revealed the presence of a CT lag followed by pseudo-first order inactivation kinetics. Sequential disinfection experiments with ozone followed by monochloramine revealed that ozone pretreatment resulted in the removal of a more prominent CT lag observed for monochloramine. In addition, the rate of inactivation for ozone-pretreated oocysts was approximately 2.5x greater than that observed for the post-lag phase portion of the monochloramine primary inactivation curve.
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