European Conference on Environmental Applications of Advanced Oxidation Processes (EAAOP-3), Date: 2013/10/27 - 2013/10/30, Location: Almeria, Spain
Proceedings of the 3rd European conference on environmental applications of advanced oxidation processes (on cd-rom)
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Abstract:
The degradation of phenol by 24 kHz ultrasonic irradiation (US) and its combinations with ozone (O3) was investigated. Operational parameters such as ultrasonic power density and ozone flow rate were investigated. The increase of ozone flow rate showed an increase in phenol degradation. This can be explained by the increase in mass transfer from the gas phase to the liquid phase. Although an increase in ozone flow resulted in an increase in degradation, the efficiency of the degradation process decreased: less COD was degraded per gram ozone dosed. A synergistic effect was shown when ozone was combined with an acoustic field. Only when the acoustic field was combined with a low ozone flow, a faster phenol degradation was established. This is primary due to the rise in value for kLa when using ozone combined with ultrasonic power.