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車時煥,金容旭 慶熙大學校 1990 論文集 Vol.19 No.-
For the stabilization of leachate from municipal landfill treatment plants aerobic and anaerobic sludge digestion processes have been applied in mesoplilic temperature range. Uncertainty of the dynamics of leachate production has led to difficulties in the design and in plematation of control strategies, including full-scale leachate treatmente aperation. The general process, in order to control pollution effectively, require long retention time(10∼20days). In this study, thermal thermophilic aerobic digestion process for stabilization of study is a developed process based on the utilization of released heat from bio oxidation of organic matter to increase the process temperature in the therphilic temperature range(50-60℃). Possibility of pretreatment with coagulant including Chitosan solution, CaCO_3 and Diafloc mixture was tested on this raw leachate and aerated leachate. The results are summarized as follows. 1. Thermal thermophilic aerobic digestion temperature 50-60℃ at operation. 2. Effective for Chitosan solution, CaCO_3 and Diafloc of various flocculant at rapid mixing period 5 to 10 minutes. 1) Chitosan with 0.2mg/ℓ was resulted 97% removal of turbidity at pH 8. 2) When flocculant is used but COD and BOD was increasing after aeration. The major advantages of this study are process design for the destruction of pathognic micro organism normally contained in the leachate.