nicofrog
09-19-2015, 02:34 PM
Sources of Methane - Landfill
https://www.ghgonline.org/images/landfill.jpgGlobal methane emissions from landfill are estimated to be between 30 and 70 million tonnes each year. Most of this landfill methane currently comes from developed countries, where the levels of waste tend to be highest.
Landfills provide ideal conditions for methanogenesis, with lots of organic material and anaerobic conditions prevalent. The huge amounts of waste that are buried in landfill sites can mean that methane is produced for years after the site is closed, due to the waste slowly decaying under the ground.
Methane escapes from landfills either directly to the atmosphere or by diffusion through the cover soil. Highly active communities of methanotrophs can develop in these overlying soils and these can greatly reduce the amounts of methane emitted.
Human Impact
Our so called 'throw away society' in developed countries has led to a large increase in the amounts of domestic kitchen waste entering landfill sites. Not only does this increase in household waste lead to greater greenhouse gas emissions in the form of landfill methane, but the waste incurs further greenhouse gas costs in transporting waste to landfill sites. As the amounts of domestic waste increase in developing countries landfill methane could become an even greater source of global methane.
https://www.ghgonline.org/images/landfill.jpgGlobal methane emissions from landfill are estimated to be between 30 and 70 million tonnes each year. Most of this landfill methane currently comes from developed countries, where the levels of waste tend to be highest.
Landfills provide ideal conditions for methanogenesis, with lots of organic material and anaerobic conditions prevalent. The huge amounts of waste that are buried in landfill sites can mean that methane is produced for years after the site is closed, due to the waste slowly decaying under the ground.
Methane escapes from landfills either directly to the atmosphere or by diffusion through the cover soil. Highly active communities of methanotrophs can develop in these overlying soils and these can greatly reduce the amounts of methane emitted.
Human Impact
Our so called 'throw away society' in developed countries has led to a large increase in the amounts of domestic kitchen waste entering landfill sites. Not only does this increase in household waste lead to greater greenhouse gas emissions in the form of landfill methane, but the waste incurs further greenhouse gas costs in transporting waste to landfill sites. As the amounts of domestic waste increase in developing countries landfill methane could become an even greater source of global methane.