| Title |
Treatment of Leachate from Municipal Solid Waste Landfill by Activated Sludge Process |
| Authors |
석종혁 ; 조광명 ( Jong Hyuk Seok ; Kwang Myeung Cho ) |
| Abstract |
Leachate from municipal solid waste landfill is an important water pollution source because it contains numerous pollutants in high concentrations. Consequently, it is strongly required to discharge leachate after proper treatment. The purpose of this study was to investigate treatability of leachate from municipal solid waste landfill by activated sludge process. Leachate from a municipal solid waste landfill for Inchon, Korea, located in a coastal reclaimed land, were used for the study. Treatment of settled leachate, supplemented with phosphoric compounds, by a completely-mixed activated sludge process at F/M ratios of 0.1∼0.4g BOD/g MLVSS-day showed SBOD removal efficiencies of 95∼97%. However, poor settleability of the activated sludge caused high SS concentrations in the effluents with a range of 94∼286㎎/ℓ. A rate constant of 0.31ℓ/gMLVSS-hr was computed by analyzing the system assuming a pseudo-first order reaction. Cell yield coefficient and endogenous decay coefficient were computed to be 0.29gMLVSS/gBOD and 0.036/day, respectively by applying the Michaelis-Menten Equation to the system. Oxygen coefficient and endogenous respiration coefficient were also computed to be 0.20㎎ O₂/㎎ BOD and 0.32㎎ O₂/㎎ MLVSS-day, respectively. |