| Title |
A Two-Stage Process, O₃ and Subsequent O₃/H₂O₂, for Effective Color Removal from Leather-Dyeing Wastewater: Case Study in the D Industrial Wastewater Treatment Plant |
| Authors |
윤여준 ( Yeojoon Yoon ) ; 박문기 ( Moonki Park ) ; 권민환 ( Minhwan Kwon ) ; 정유미 ( Youmi Jung ) ; 강준원 ( Joon Wun Kang ) |
| Keywords |
Color removal; H₂O₂; Leather-dyeing wastewater; O₃; O₃-demand; Serial process |
| Abstract |
The aim of this study is to evaluate color removal from leather-dyeing wastewater using O₃ and O₃/H₂O₂ unit processed and a serial process for O₃ followed by the O₃/H₂O₂ process. The color removal rate of the O₃ alone process was only 65% effective and the color increased when an applied O₃ dose of more than 40~50 ㎎/L was applied. On the other hand the color was completely removed without increments of color by the O₃/H₂O₂ process with H₂O₂ injection ratio of 0.2 and 0.3(wt. H₂O₂/wt. O₃). Even though the injection of H₂O₂ had an effect on color removal rates from O₃ alone and from O₃/H₂O₂ were similar up to the initial O₃-demand stage with an application of 0~40 mg/L O₃. In conclusion it was found that the O₃ followed by the O₃/H₂O₂ serial process the method injecting H₂O₂ after ozonation with O₃-demand(30~40mg/L) in the first stage is the most appropriate process for effective color removal from leather-dyeing wastewater. |