| Title |
Characteristics of Refractory Organic and Color removal in Pigment Wastewater by Advanced Oxidation Process |
| Authors |
이종현(Jong Hyun Lee),박재홍(Jae Hong Park),남해욱(Hai Uk Nam),김영규(Young Gyu Kim),박태주(Tae Joo Park) |
| Abstract |
The wastewater from a pigment industry has various organic compounds and one of the most hardly-treated wastewaters. As the characteristics of the pigment wastewater is almost non-soluble to any solvents and less biodegradable, it is difficult to treat the pigment wastewater by the conventional activated-sludge treatment facilities only. This study was designed to evaluate the characteristics of a nonbiodegradable organic and color removal by the ozone AOP and the ozone/hydrogen peroxide AOP and to identify the feasibility of these AOPs as a pretreatment or a tertiary treatment following the activated sludge process in the pigment wastewater. The study was divided into two parts of experiments. The first experiment was performed to know the characteristics of the organic and color removal on Red wastewater, Composite wastewater and Final effluent The second experiment of combined the ozone oxidation and the activated sludge process was performed to compare with the existing extended aeration treatment plant In the treatment of Red and Composite wastewater, the O₃ oxidation was more effective than the H₂O₂/O₃ oxidation on reducing loadings of COD_(Cr) and color. While, the H₂O₂/O₃ oxidation was more effective than the O₃ oxidation on reducing loadings of COD_(Cr) in the treatment of Final effluent In the Red wastewater, the O₃ oxidation resulted in 72.3% and 99% reduction of COD_(Cr) and color respectively, the O₃ oxidation of Composite wastewater resulted in 28.9% reduction of COD_(Cr). In the experiment of the Final effluent, the H₂O₂/O₃ oxidation resulted in 40.9 reduction of COD_(Cr) and the O₃ oxidation indicated 67.6% reduction of color. Also, the second experiment of combining the O₃ oxidation and the activated sludge process at 17hrs HRT was showed more effective than the extended aeration treatment plant at 34hrs HRT. Therefore, the ozone AOP can be the promising process for a pretreatment or a tertiary treatment in the pigment wastewater. |