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Numerical modelling of ozonation process with respect to bromate formation. Part II – Model validation

Olsińska Urszula

Chemical and Process Engineering

2019

Vol. 40, nr 1

39–47

Validation results of a theoretical model that describes the formation of bromate during ozonation of bromide-containing natural waters are presented. An axial dispersion model integrating the nonideal mixing, mass-transfer and a kinetic model that links ozone decomposition reactions from the Tomiyasu, Fukutomi and Gordon ozone decay model with direct and indirect bromide oxidation reactions, oxidation of natural organic matter and reactions of dissolved organics and aqueous bromine was verified. The model was successfully validated with results obtained both at a laboratory and a full scale. Its applicability to different water supply systems was approved.

Numerical modelling of ozonation process with respect to bromate formation. Part I – Model development

Olsińska Urszula

Chemical and Process Engineering

2019

Vol. 40, nr 1

21-–38

The paper focuses on the modelling of bromate formation. An axial dispersion model was proposed to integrate the non-ideal mixing, mass-transfer and a kinetic model that links ozone decomposition reactions from the Tomiyasu, Fukutomi and Gordon (TFG) ozone decay model with direct and indirect bromide oxidation reactions, oxidation of natural organic matter and its reactions with aqueous bromine. To elucidate the role of ammonia an additional set of reactions leading to bromamine formation, oxidation and disproportionation was incorporated in the kinetic model. Sensitivity analysis was conducted to obtain information on reliability of the reaction rate constants used and to simplify the model.