オゾン/UV プロセスのための CFD シミュレータの開発

概要

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A new Computational Fluid Dynamics (CFD) simulator for the ozone/UV process has been developed. The radical reaction model used in this simulator was validated by comparing both calculation and experimental results obtained from a completely stirred tank reactor system. Using this simulator, the distributions of relevant substances such as dissolved ozone, hydroxyl radical and organic compounds in the reactor can be investigated. The simulation results of the conventional ozone/UV reactor, i.e., the tube-type reactor where a UV lamp is inserted in parallel to water flow, showed that this conventional reactor is inefficient because hydroxyl radical concentration is high only at the inlet where ozonecontaining water flows in. Furthermore, the results obtained from the simulations with various UV intensity distributions of the lamp showed that the intensified irradiation around the inlet caused 20% improvement in the organic removal efficiency. Thus, the developed simulator is expected to contribute towards the optimization of the ozone/UV reactor for decomposing refractory pollutants.
2003-08-10