AWWA JAW60511

Current approaches for chlorine disinfection process design involve application of a C × T(concentration × time) concept or the integrated disinfection design framework (IDDF) (Bellamyet al, 1998). This study presents a new design approach for chlorine disinfection that usescomputational fluid dynamics (CFD). CFD models were developed to predict flow structure, masstransport, chlorine decay, and microbial inactivation in a continuous-flow reactor andassociated piping. Past CFD models for chlorine disinfection have only predicted chlorinecontactor flow structure and residence time distribution (Crozes et al, 1999; Wang & Falconer,1998; Hannoun & Boulos, 1997; Stambolieva et al, 1993). The model described here incorporatesexperimentally 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 rangeof microbial inactivation rates. Includes 26 references, tables, figures.

Product Details

Edition:

Vol. 96 - No. 8

Published:

08/01/2004

Number of Pages:

13

File Size:

1 file , 560 KB