The calculation method for leachate quantity through solid waste landfill has not been established yet. Previously we studied the applicability of the leachate runoff analysis applying the tank model method and others based on the data observed at landfill sites without lining system.
This paper describes the analysis of leachate quantity and capacity calculation of leachate control basin, using the tank model method, the mass-balance method and the rational method to simulate the leachate quantity data observed at the landfill site with a lining system.
Consequently, a time series of leachate runoff can be simulated by the tank model method more than by other methods. And also, it was derived that the capacity of leachate control basin for the capacity of a leachate treatment plant is remarkably dependent upon the method of calculation for leachate quantity.

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Laboratory scale experiments on aerobic/anaerobic operations of the sequencing batch reactor (SBR) activated sludge processes were conducted. The aim of these experiments was removal of nitrogen and refractory organic compounds in municipal landfill leachate by adding methanol as a hydrogen donor. NH₄-N concentrations in leachate ranged from 100 mg/l to 200 mg/l. A high concentration of refractory organic compounds (100 mg/l to 150 mg/l as COD) was observed in the leachate. 95% or more nitrogen removal was achieved in the operation with an optimum length of aerobic and anoxic/anaerobic period for nitricicationdenitriofication process. About 50% removal for refractory organic compounds was achieved by the SBR activated sludge process with the combination of oaonation as pretreatment.

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