Abstract
For the removal of odorous compounds such as dimethylisoborneol (2-MIB) and trihalomethanes (THMs) in supplied water, advanced water treatment plants using ozonation and activated carbon absorption processes have been built in Japan. This paper describes an over-all chemical reaction model for the ozone contactor of the ozonation process. In this model, the Potassium Permangante Consumed (PPC) is assumed as an index of typical ozone consuming substances. The experimental data and calculated results for the ozone consuming substances are compared with Total Trihalomethanes Formation Potential (TTHMFP). Furthermore, the promotive or inhibitive reaction of 2-NUB is introduced in the model. This allows the mathematical model to be applied to actual raw water containing many kinds of co-exist substances.The model appropriateness is discussed using pilotplant data for a year's operation.
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