Inactivation of Cryptosporidium parvum oocysts with ozone

被引：164

作者：

Rennecker, JL

Mariñas, BJ ^{[1
]}

Owens, JH

Rice, EW

机构：

[1] Univ Illinois, Dept Civil Engn, Urbana, IL 61801 USA

[2] US EPA, Natl Risk Management Res Lab, Cincinnati, OH 45268 USA

来源：

WATER RESEARCH | 1999年 / 33卷 / 11期

关键词：

C-parvum strains; Cryptosporidium parvum; inactivation kinetics; in vitro excystation; ozone disinfection; semi-batch reactor; temperature dependence;

D O I：

10.1016/S0043-1354(99)00116-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ozone inactivation rates for Cryptosporidium parvum (C. parvum) oocysts were determined with an in vitro excystation method based on excysted sporozoite counts. Results were consistent with published animal infectivity data for the same C. parvum strain. The inactivation kinetics for C. parvum were characterized by a lag phase followed by pseudo-first order kinetics. Both the magnitudes of the lag phase and the pseudo-first order rate constant were found to be different for C. parvum oocysts from two different sources, and to obey Arrhenius law for the experimental temperature range of 5-30 degrees C. CT requirements for C. parvum inactivation were found to increase by an average Factor of approximately three for every 10 degrees C decrease in temperature. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2481 / 2488

页数：8

共 21 条

[1] Improved purification methods for calf-derived Cryptosporidium parvum oocysts using discontinuous sucrose and cesium chloride gradients [J].