Garbage is buried in landfills subject to a series of transformations physics, chemistry, biology occur simultaneously. When water flows through will carry the chemicals were decomposing garbage. The composition of pollutants in the leachate depends on many factors, such as solid waste composition, humidity, time burying, compression, type and thickness of the coating material on the same, the movement speed of water in the landfill, dilution with surface water and groundwater, the presence of the inhibitor, the macro nutrients and micronutrients, the design and operation of the landfill, the solid waste landfill , toxic waste, sludge from the treatment plant.
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