earticle

영어

The removal efficiency of 41 pharmaceuticals contained in secondary treated wastewater was investigated with continuous UV and UV/H2O2 processes having capacity of 10 m3/d. In this study, in order to evaluate the removal potential of UV and UV/H2O2 processes for the pharmaceuticals, a residual ratio that is defined a ratio of a residual concentration of a target pharmaceutical after treatment to its initial concentration was selected at 10min of contact time in UV or UV/ H2O2 process (the amount of energy irradiated: 0.4 kWUV·h/m3). For UV process, the residual ratios of 39 pharmaceuticals ranged from 0.003 (diclofenac) ~ 0.867 (ethenzamide), resulting in low degradation for most of the pharmaceuticals investigated except for a few of the pharmaceuticals including diclofenac and sulfonamides. Especially, the residual ratios of ethenzamide, clarithromycin and N,N-diethyl-m-toluamide were 0.867, 0.818 and 0.780, respectively and these values were considerably higher than those of the other pharmaceuticals. On the other hand, for UV/H2O2 process, the residual ratios of most of the pharmaceuticals were less than 0.001, which indicates that UV/H2O2 process would be an effective treatment method when the pharmaceuticals in secondary effluent would be further removed.

한국어

본 연구에서는 일 처리용량 10톤 규모의 연속실험장치를 이용하여 하수처리장으로부터의 2차 처리수중에 존재하고 있 는 의약품류의 제거성능을 검토하였다. 검토된 공정은 UV 및 UV/H2O2 공정이며, 그 제거성능 은 접촉시간 10분(UV 투 입에너지량 : 0.4 kWUV·h/m3)후의 잔존율을 이용하여 평가하였다. UV 단독처리의 경우, 검출 된 41종의 의약품류중 39 종의 잔존율이 0.003(diclofenac) ~ 0.867(ethenzamide)으로 매우 폭넓은 범위로 나타났다. 특히, diclofenac 및 sulfonamide계 항생제 이외의 의약품류는 대체로 잔존율이 높은 결과가 얻어졌다. 한편, UV/H2O2 공정의 경우, 대부분의 의약품류의 잔존율이 0.001 이하가 되어, 본 공정이 다양한 종류의 의약품류를 제어하는데 있 어서는 매우 효과적인 것으 로 나타났다.