| Summary: | The odor released from environmental facilities is recognized as a major problem in environmental industries. In this study, reactive absorption, using an electrolyzed water solution (electrolyzed water scrubber, EWS), was developed to treat the odorous gases H<sub>2</sub>S and NH<sub>3</sub>, which are representative odorous substances. In addition, a numerical model composed of mass transfer coefficients and zero-order kinetic constants was established to predict the performance of EWS. The model was verified through experiments and data fittings. In the experiments, the concentration of H<sub>2</sub>S varied from 500 to 2000 ppm, while NH<sub>3</sub> was fixed at 500 ppm. The results revealed that the H<sub>2</sub>S removal rate varied depending on the inlet H<sub>2</sub>S concentration, but no changes were observed for NH<sub>3</sub>. The numerical model appropriately described the experimental results to further predict the performance of EWS. The model prediction results for the shock loading of H<sub>2</sub>S indicated that a 100% removal rate can be achieved by increasing the current density to 70 mA cm<sup>−2</sup> or higher. Finally, the EWS can be used to reduce the odor, owing to its flexible operation that responds to fluctuating loading rates.
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