Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analyzing Disinfection Kinetics and Reactor Design: A Conceptual Approach Versus the SWTR
The Surface Water Treatment Rule (SWTK) specifies C x T values for achieving various degrees of inactivation of pathogenic microorganisms, with C being the concentration of the disinfectant in the effluent from any reactor and T being a characteristic contact time dependent on reactor hydraulics. The disinfection credit calculated for reactors using the SWTR‐prescribed C x T approach is compared with predictions based on accepted disinfection kinetics and fundamental reactor behavior. This analysis demonstrates that the C x T approach lacks a sound conceptual basis, tends to be somewhat conservative, and is unnecessarily costly for many water treatment plants. A dimensionless parameter, k' Cθ, the product of a disinfection rate constant, the effluent disinfectant concentration, and the theoretical detention time, provides a systematic approach for evaluating disinfection conditions and plant modifications. The decay of chlorine in the reactor is considered, and an error in a previous Journal article is corrected.
Analyzing Disinfection Kinetics and Reactor Design: A Conceptual Approach Versus the SWTR
The Surface Water Treatment Rule (SWTK) specifies C x T values for achieving various degrees of inactivation of pathogenic microorganisms, with C being the concentration of the disinfectant in the effluent from any reactor and T being a characteristic contact time dependent on reactor hydraulics. The disinfection credit calculated for reactors using the SWTR‐prescribed C x T approach is compared with predictions based on accepted disinfection kinetics and fundamental reactor behavior. This analysis demonstrates that the C x T approach lacks a sound conceptual basis, tends to be somewhat conservative, and is unnecessarily costly for many water treatment plants. A dimensionless parameter, k' Cθ, the product of a disinfection rate constant, the effluent disinfectant concentration, and the theoretical detention time, provides a systematic approach for evaluating disinfection conditions and plant modifications. The decay of chlorine in the reactor is considered, and an error in a previous Journal article is corrected.
Analyzing Disinfection Kinetics and Reactor Design: A Conceptual Approach Versus the SWTR
Lawler, Desmond F. (Autor:in) / Singer, Philip C. (Autor:in)
Journal ‐ American Water Works Association ; 85 ; 67-76
01.11.1993
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Reactors , Surface Water , Regulations , Design , Kinetics , CT Values , Disinfection
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