Landfill gas, composition, manufacture and use.
Landfill gas – gas from organic waste is released from the debris, a type of biogas resulting from anaerobic decomposition of organic waste.
Landfill gas – gas from organic waste is released from the debris, a kind of biogasresulting from anaerobic decomposition of organic waste.
Organic waste in landfills rotting away under the influence of two groups (families) of bacteria:
Acidogenic are in the process of primary decomposition of garbage on the fatty acid (aliphatic monobasic carboxylic acids with open chain). In turn, methanogens processed fatty acids into methane CH4 and carbon dioxide CO2. These substances are the main components of landfill gas.
In order to collect landfill gas for further use, the required special polygon structure. The landfill is a pit dug, the bottom of which is fitted with an impermeable membrane. The pit is filled with trash and compacted. The top is filled with clay, covered with a roof or protective coating. In the body of the pit paved with engineering structures that divert generated landfill gas in the gas-cleaning apparatus for cleaning from dust particles and unwanted impurities. After cleaning the landfill gas is ready for further use.
The adequate landfill gas at the landfill continues to 30-70 years. After the cessation of production of landfill gas the landfill can be reused.
Since landfill gas contains methane, it is used as fuel for production of electricity, heat or steam, or as an automotive fuel.
Landfill gas project is one of the important ways to prevent global warming, because the impact of methane on global climate change 23-25 times stronger than the effect of carbon dioxide.
|Carbon dioxide, CO2||25-50|
|Hydrogen sulfide, H2S||0-3|
|Other organic substances|
Due to the heterogeneity of waste composition in the landfill gas can be a different ratio of methane and carbon dioxide.
Also in its composition landfill gas contains hazardous and toxic substances.
– gas oil,
– oil shale,
– fuel oil,
– associated petroleum gas,
– natural gas,
– landfill gas,
– shale oil,
– shale gas,
– synthesis gas.
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