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DOI : ,    Vol.9, No.4, 29 ~ 35, 2001
Title
A Study on Configuration of Leachate Treatment Systems by Existing Wastewater Treatment System and Electrodialysis Process
현길수Kil Soo Hyun
Abstract
The purpose of this research was to evaluate the optimal configuration of wastewater treatment processes for an advanced treatment of leachate in order for the reuse of leachate and river revival. The leachate from the landfill of incinerated ashes was used as raw water. Leachate treatment system used for this research consists of existing advanced wastewater treatment system (AWTS) of full-scale plant and electrodialysis(ED) process of pilot-scale plant. The AWTS consists of activated sludge process(AOAO), trickling filter(TF), flocculation-sedimentation basins(F-S), sand filters(SF), and GAC beds. Based on the results of this researches, AOAO process was considerably effective in removing nitrogen. The removal efficiencies of the AWTS were more than 90% for COD and T-N except for total dissolved solids (TDS) and ions, which was less than removal efficiency of 5%. TDS and ions removals by ED alone averaged 95%, which indicates that it was considerably effective in separating TDS from the leachate. For the optimal configuration of leachate treatment system, organic matter in influent wastewater was considered to be adequate as an alternative external carbon source of methanol for denitrification of the AOAO process. Biological-film filtration process as an alternative process of TF, F-S, and SF was evaluated to be effective in removing residual organics, nitrogen, and SS of effluent from AOAO.
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