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고급산화에 의한 유기안료폐수의 난분해성 유기물과 색도제거 특성
이종현(Jong Hyun Lee),박재홍(Jae Hong Park),남해욱(Hai Uk Nam),김영규(Young Gyu Kim),박태주(Tae Joo Park) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.1
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.
이종현,남해욱,김영규,박태주 ( Jong Hyun Lee,Hae Uk Nam,Young Gyu Kim,Tae Joo Park ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.2
A new biological nutrient removal system combining A²/O process with fixed film was developed in this work and the characteristics of phosphorus removal were especially investigated in the combined fixed film reactor(CFFR). Media was added in the anaerobic, anoxic and aerobic reactors, respectively. Tests were made to establish the effluent level of T-P, COD, pH, SS and nitrate effects on phosphorus removal in the CFFR by decreasing hydraulic retention time (HRT) from 10 to 3.5 hours and by increasing internal recycle ratio from 0% to 200%. The influent was synthesized to levels similar to the average influent of municipal wastewater treatment plants in Korea. SARAN media with a porosity of 96.3% was packed 40%/30%/25% based on its reactor volume, respectively. It was found that T-P removal efficiencies were 39.4% 20.5% as HRT decreased from 10 hours to 3.5 hours and optimum range of pH for effective phosphorus removal was 6.8∼7.7. Nitrate inhibited the P release in anaerobic reactor. As the internal recycle ratio increased from 0% to 100%, T-P removal efficiency increased in CFFR process, while T-P removal efficiency decreased at the condition of the internal recycle ratio, 200%. Further study especially on P uptake by denitrifying phosphorus removal bacteria in anoxic reactor is needed to enhance T-P removal efficiency in CFFR process.