2. Methane generation process in a landfill
The main degradation products from a landfill are carbon dioxide (CO2), water and heat for the aerobic process, and methane (CH4) and carbon dioxide (CO2) for the anaerobic process [21]. CH4 and CO2 are also the major landfill gases (LFG) with relative amounts of 40–45% and 55–60% by volume, respectively, for CH4 and CO2[22] while some authors put the values at 50–60% and 30–40% by volume [23]. The factors that influence methane generation in landfill are the composition of the waste and availability of readily biodegradable organic matter, the age of the waste, moisture content, pH and temperature [24]. Three processes that lead to the formation of landfill gas are bacterial decomposition, volatilization, and chemical reactions [25].
2. Methane generation process in a landfillThe main degradation products from a landfill are carbon dioxide (CO2), water and heat for the aerobic process, and methane (CH4) and carbon dioxide (CO2) for the anaerobic process [21]. CH4 and CO2 are also the major landfill gases (LFG) with relative amounts of 40–45% and 55–60% by volume, respectively, for CH4 and CO2[22] while some authors put the values at 50–60% and 30–40% by volume [23]. The factors that influence methane generation in landfill are the composition of the waste and availability of readily biodegradable organic matter, the age of the waste, moisture content, pH and temperature [24]. Three processes that lead to the formation of landfill gas are bacterial decomposition, volatilization, and chemical reactions [25].
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