An advanced oxidation process using ionized gas for wastewater treatment

摘要

This study on removing non-degradable materials in wastewater focused primarily on advancednoxidation methods such as ozone, ozone/UV and ozone/H2O2. Wastewater treatment usingnan ionized gas from plasma has been actively progressing. The ionized gas involves reactivenspecies such as O2n+n,O2n2 cluster, O radical and OH radical. Since the ionized gas method has suchnoutstanding characteristics as relatively simple structures, non-calorification, non-toxicity andnlow electricity consumption, it evidently of interest as a new process. A series of experimentsnwere conducted to demonstrate the feasibility of ionized gas as a useful element for thendiminution of nondegradable organic matters. On the other hand, a large amount of organicnmatters were changed to hydrophilic and the compounds containing aromatic functional groupngradually decreased. The results implied that the ionized gas has been able to degrade thennon-biodegradable organic matters. Therefore, the oxidation process by using an ionizedngas process could be considered as an effective alternative unit in water and wastewaterntreatment plants.