2 Methods of waste disposal 2.1 Landfills a modern municipal solid waste landfill is typically constructed above an impermeable clay layer that is lined with an im permeable membrane and includes mechanisms for dealing with liquid and gas materials generated by the contents of the landfill Jinan University
2 Methods of waste disposal ◼ 2.1 Landfills ◼ A modern municipal solid waste landfill is typically constructed above an impermeable clay layer that is lined with an impermeable membrane and includes mechanisms for dealing with liquid and gas materials generated by the contents of the landfill
2 Methods of waste disposal Selection of landfill sites is based on an understanding of local geologic conditions such as the presence of a suitable clay base, groundwater geology, and soil type u It is important to address local citizens' concerns New landfills have complex bottom layers to trap contaminant-laden water, called leachate, leaking through the buried trash Jinan University
2 Methods of waste disposal ◼ Selection of landfill sites is based on an understanding of local geologic conditions such as the presence of a suitable clay base, groundwater geology, and soil type. ◼ It is important to address local citizens’ concerns. ◼ New landfills have complex bottom layers to trap contaminant-laden water, called leachate, leaking through the buried trash
2 Methods of waste disposal a Monitoring systems are necessary to detect methane gas production and groundwater contamination In some cases, methane produced by decomposing waste is collected and used to produce heat or generate electricity The water that leaches through the site must be collected and treated Jinan University
2 Methods of waste disposal ◼ Monitoring systems are necessary to detect methane gas production and groundwater contamination. ◼ In some cases, methane produced by decomposing waste is collected and used to produce heat or generate electricity. ◼ The water that leaches through the site must be collected and treated
2 Methods of waste disposal Selecting sites for new landfills in locations like Toronto. New york and Los angeles is extremely difficult because of (1) the difficulty in finding a geologically suitable site and (2)local opposition, which is commonly referred to as the NImBy, or "not-in-my-backyard syndrome Jinan University
2 Methods of waste disposal ◼ Selecting sites for new landfills in locations like Toronto, New York and Los Angeles is extremely difficult because of : ◼ (1) the difficulty in finding a geologically suitable site and ◼ (2) local opposition, which is commonly referred to as the NIMBY, or “not-in-my-backyard” syndrome
Landfill Jinan University
Landfill