Designing Ozone Systems for Cryptosporidium Inactivation:Evaluating Impacts of New EPA CT Requirements

摘要

The impacts of new CT requirements for ozone disinfection of Cryptosporidium are evaluatedrnusing a desktop CT disinfection analysis. The analysis is applied to the design of new andrnupgraded ozone systems for two water treatment plants in Virginia. The results indicate that thernfeasibility of ozone disinfection of Cryptosporidium is dependent on ozone demand and decayrncharacteristics of the water supply and may not be feasible for water supplies with moderate tornhigh ozone decay rates. The CT analysis is a useful design procedure to evaluate the benefit-costrntradeoffs of using ozone to achieve alternative disinfection goals.