Phonological studies of the new gas-induced agitated reactor using computational fluid dynamics

An ozone-induced agitated reactor has been found to be very effective in de grading industrial wastewater. However, the cost of the ozone generation as well as its short residence time in reactors has restricted its applicatio n in a commercial scale. An innovated gas-induced draft tube installed insi de a conventional agitated reactor was proved to effectively retain the ozo ne in a reactor. The setup was demonstrated to significantly promote the oz one utilization rate up to 96% from the conventional rate of 60% above the onset speed. This work investigates the mixing mechanism of an innovated ga s-induced reactor for the future scale-up design by using the technique of computational fluid dynamics. A three-dimensional flow model was proposed t o compute the liquid-gas free surface as well as the now patterns inside th e reactor. The turbulent effects generated by two 45 degrees pitch-blade tu rbines were considered and the two phases mixing phenomena were also manipu lated by the Eulerian-Eulerian techniques. The consistency of the free surf ace profiles and the fluid flow patterns proved a good agreement between co mputational results and the experimental observation.