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Such systems are prone to internal failure as landfills suffer large internal movements as waste decomposes unevenly and thus buckles and distorts pipes. If a leachate collection system fails, leachate levels will slowly build in a site and may even over-top the containing membrane and flow out into the environment.
A landfill [a] is a site for the disposal of waste materials. ... geologically stable sites and collection systems to contain and capture this leachate. It can then ...
If they are above these levels the waste must be taken to a hazardous waste disposal facility and the cost of disposal may increase from about $50.00/ton to as much as $1200.00/ton. As extremely contaminated material is expensive to dispose of, grading is necessary to ensure safe disposal and to avoid paying for disposal of "clean fill."
Leachate Collection and Removal Systems - sit on top of the composite liner and removes leachate from the landfill for treatment and disposal. [5] Operating Practices - including the compacting and covering of waste frequently with several inches of soil to help reduce odor; control litter, insects and rodents; and protect public health. [5]
Double-liner systems are usually found in municipal solid waste landfills, as well all hazardous waste landfills. The first layer is constructed to collect the leachate, while the second layer is engineered to be a leak-detection system to ensure that no contaminants seep into the ground.
The landfill must have at least two impermeable liners as well as a system for leachate collection to prevent any water contamination. In addition to this, the landfill must also have a groundwater monitoring system in case there is a leak; the wells can be pumped to remove the contaminated water for treatment. [7]
Landfills are the primary method of waste disposal in many parts of the world, including United States and Canada.Bioreactor landfills are expected to reduce the amount of and costs associated with management of leachate, to increase the rate of production of methane (natural gas) for commercial purposes and reduce the amount of land required for land-fills.
Leachate evaporation system. [9] The gas coming from the landfill can be used to evaporate leachate in situations where leachate is fairly expensive to treat. The system to evaporate the leachate costs $300,000 to $500,000 to put in place with operations and maintenance costs of $70,000 to $95,000 per year.