This study presented the plan for treatment plant as investigating the technical examination of existing landfill leachate treatment plant at Geumgo-Dong and the plan of landfill leachate treatment with sewage treatment. The R/O process in 1st stage landfill leachate treatment plant(plant capacity:150m3/d) was closed in consideration of economical aspect and efficiency. It is to be desired that the 1st stage and 2nd stage landfill leachate treatment (plant capacity: 250m3/d) are combined, and are converted the Pretreatment process with nitrogen treatment process, and after total landfill treatment leachate happened from landfill site is pretreated it is transferred the sewage treatment plant. Ammonia nitrogen load of landfill leachate that was transferredthe sewage treatment plant(plant capacity: 300,000m3/d). This load is no problem at now, but it is need change the inflow line for sewage treatment plant and the enlargement of pretreatment process in case that the raw landfill leachate is increased.

모의지하수중에서 가압경수로형 사용후핵연료로부터 세슘의 침출률에 미치는 공학적 방벽 영향을 규명하기 위하여 지난 약 6년간 벤토나이트 또는 금속시편등의 존재여부에 따라 침출시험을 수행하였다. 침출률은 시간이 경과함에 따라 지수함수적으로 감소하는 경향을 나타내었으며, 적정시간이 경과한 다음부터는 일정한 값에 수렴하는 경향을 나타내었다. 벤토나이트 또는 금속시편이 있을 경우 세슘의 누적누출분률은 선형적으로 증가하였으나, 이들이 없는 경우의 누적분률은 급격히 증가한 다음 서서히 증가하는 경향을 보였다. 이 누적분률에서 갭에 존재하는 세슘의 재고량을 제한 값은 공학적 방벽이 존재하는 경우의 누적분률에 거의 근접하였다. 이러한 결과들은 사용후핵연료 중 세슘의 초기누출분률은 갭 중 세슘의 재고량에 의존하지만, 세슘의 장기침출률은 공학적 방벽에 거의 영향을 받지 않음을 암시해 주고 있다. 그러나 세슘의 초기침출률은 공학적 방벽의 지연효과로 감소될 수 있을 것이다. 그리고 처분장에서 사용후핵연료 중 세슘의 장기침출률은 를 넘지않는 범위 내에서 일정한 값을 가질 것이다.

This study was aimed to investigate treatment feasibility of leachate from D landfill that is located in gyr대ungbuk. From the analytical results of leachate, organic and nonbiodegradable matters were contained in high concentration. Thus chemical treatment was introduced to degrade nonbiodegradable matters in pre or post biological process. Two types of Fenton oxidation were adapted in this study. The first one is pre treatment process before biological treatment. The second one is post treatment process after biological treatment. The optimal conditions of both treatment methods were investigated as follows. In case of pre treatment process, the optimal conditions appeared in Fe+2/H2O2(mmol/mmol): 0.1, H2O2/CODcr(mg/mg): 27.0, pH: 3 and reaction time: 2hrs. On the other hand, in case of post treatment process, the optimal conditions appeared in Fe2+(mmol/mmol): 0.14, H2O2/CODcr(mg/mg): 57.4, pH: 3 and reaction time: 1.25hrs. In the above optimal conditions, high COD removal was obtained in pre and post treatment process. Also it can expect that Fenton oxidation converted nonbiodegradable matters into biodegradable matters.