Semi-Empirical Model Based on the Mass Balance

3 Semi-Empirical Model Based on the Mass Balance 

In the following first example the liquid ozone concentration and the OH-radical concentration are calculated with semi-empirical formula from the mass balance for ozone (Laplanche et al., 1993). For ozonation in a bubble column, with or without hydrogen peroxide addition, they developed a computer program to predict the removal of micropollutants. The main influencing parameters, i. e. pH, TOC, U V absorbance at 254 nm (SAC254), inorganic carbon, alkalinity and concentration of the micropollutant M are taken into consideration. 

The steady-state liquid ozone concentration is calculated with the help of a mass balance in which for the decay term the following equation was used  

Based on 56 experiments carried out on natural water the following semi-empirical equation was developed  

This model was also successfully applied for three different experimental set-ups taken from literature with ozonated spiked tap water or raw water of similar composition. In each case good correlation between the experimental and calculated data was obtained. 

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