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UV/TiO2/H2O2 시스템을 이용한 매립지 침출수 처리
김성준,문정의 대한상하수도학회 1997 상하수도학회지 Vol.11 No.4
In order to treat the landfill leachate, UV/TiO_2/H_2O_2 system connected with biological treatment was investigated, and proper pretreatment methods were examined to reduce the load on the system considering economical and technical efficiency. It was more profitable to put H_2O_2 into the system in the early stage for the sample which was treated with H_2SO_4 to decrease alkalinity and with FeCl_3-6H_2O flocculation. Because the required reaction time run up by increasing H_2O_2 input amount, though the COD was reduced slightly, the optimal H_2O_2 input amount should be determined for the desired COD and the economical efficiency. The appropriate way to get the lowest COD in the shortest time was the method to treat the sample which was controlled to pH 3.5 after adjusting to pH 12 and put 500 ppm H_2O_2 into the system. In that case, to increase H_2O_2 input amount was not profitable for the system efficiency. The sufficient photocatalytic excited time was required to reduce the photocatalytic decomposition time for the sample which was gone through the alkali state.