Publication:
Modeling Cryptosporidium spp. Oocyst inactivation in bubble-diffuser ozone contactors

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Authors
Tomiak, Robert B.
Rennecker, Jason L.
Marinas, Benito J.
Miltner, Richard J.
Owens, James H.
Subjects
Advisors
Date of Issue
1998-07
Date
Publisher
Monterey California. Naval Postgraduate School
Language
en_US
Abstract
The CT concept (product of disinfectant concentration and characteristic contact time) is currently used to demonstrate compliance with disinfection requirements for Giarda lamblia (G. lamblia) and viruses under the Surface Water Treatment Rule (SWTR). Minimum CT requirements include large safety factors to account for possible deviations from actual disinfection efficiencies achieved in full-scale contactors. The application of this conservative regulatory approach for Cryptosporidium parvum (C. parvum) might result in unrealistic disinfection requirements under the Enhanced SWTR due to the much stronger resistance of this protozoan parasite to inactivation by all chemical disinfectants used in drinking water applications. There is a need for the development of approaches that could provide a more accurate assessmant of actual inactivation efficiency achieved in disinfection contactors. The main objective of this study is to develop and apply a mathematical model predicting the inactivation of Cryptosporidium app. (C. parvum and C. muris) oocysts in ozone bubble-diffusers contactors. The model is calibrated with semi-batch kinetic data, verified with pilot-scale inactivation experiments, and used for predicting and optimizing full-scale disinfection efficiency.
Type
Thesis
Description
CIVINS (Civilian Institutions) Thesis document
Department
Environmental Engineering
Organization
University of Illinois at Urbana-Champaign
Identifiers
NPS Report Number
Sponsors
Funder
Format
75 p.
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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