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AWWA WQTC60691
- Numerical Prediction of Mixing Performance for Chloramines
- Conference Proceeding by American Water Works Association, 11/15/2004
- Publisher: AWWA
$12.00$24.00
Free chlorine is widely used as a primary and secondary disinfectant for drinking water.When disinfection byproducts (DBPs) are concerned or where the free chlorineresidual is difficult to maintain, chloramines are usually used to provide a stabledisinfection residual in distribution systems. Kinetic models for chloramines have beendeveloped by researchers in a bench-scale level. Chloramines are formed when freechlorine and ammonia are mixed in a turbulent environment. Currently, experience andrule of thumb are used in the design of mixers that are used in the chloraminationprocess. In this study, CFD models combing the chloramines kinetic model and the turbulentmicro-mixing model were developed and tested against tracer testing and pilot-scale testing. Anew micro-mixing model multi-fluid model (MFM) was used together with thetraditional species transportation model. Numerical simulations were compared withexperimental measurements to evaluate the model's performance. Includes 4 references, table, figures.
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