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MODELING INACTIVATION OF GIARDIA LAMBLIA
Citation:
Clark*, R M. MODELING INACTIVATION OF GIARDIA LAMBLIA. JOURNAL OF ENVIRONMENTAL ENGINEERING. American Society of Civil Engineers (ASCE), Reston, VA, 116(5):837-853, (1990).
Impact/Purpose:
information
Description:
Under the auspices of the Safe Drinking Water Act (SDWA)the U.S. EPA hasa promulgated the Surface Water Treatment Rule (SWTR) requiring public water systems using surface water to provide minimum disinfection to Control Giardia Lamblia, enteric virsues, and bacteria. The C-t concept (concentration of disinfectant in mg/LL times, times in minutes) is used to establish the appropriate criteria for a surface system to achieve at least 99.9% inactivation of Giardia lamblia and 99.9% inactivation for viruses. In the SWTR, an empirical equation was developed based on water temperatures, pH, concentration of chlorine, and inactivation level to predict required disinfection criteria (C - t values).. THis paper describes the development of an equation based on Chick-Watson kinetics that provides equivalent information but is theoretically more consistent.
