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CFD Design Approach for Chlorine Disinfection Processes
Author(s) -
Greene Dennis J.,
Farouk Bakhtier,
Haas Charles N.
Publication year - 2004
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.2004.tb10685.x
Subject(s) - computational fluid dynamics , chlorine , contactor , piping , chemistry , water disinfection , environmental science , mechanics , environmental engineering , thermodynamics , physics , power (physics) , organic chemistry
Current approaches for chlorine disinfection process design involve application of a C x T (concentration x time) concept or the integrated disinfection design framework (IDDF) (Bellamy et al, 1998). This study presents a new design approach for chlorine disinfection that uses computational fluid dynamics (CFD). CFD models were developed to predict flow structure, mass transport, chlorine decay, and microbial inactivation in a continuous‐flow reactor and associated piping. Past CFD models for chlorine disinfection have only predicted chlorine contactor flow structure and residence time distribution (Crozes et al, 1999; Wang & Falconer, 1998; Hannoun & Boulos, 1997; Stambolieva et al, 1993). The model described here incorporates experimentally derived terms for chlorine decay (free and combined) and microbial inactivation ( Escherichia coli , MS2 bacteriophage, and Giardia muris ) based on the work of Haas et al (1995). CFD predictions were in good agreement with the experimental data set over a wide range of microbial inactivation rates.