Methane is continuously released mainly during landfill operation, but can also extend long after landfill closure; methane generation is uncontrollable because it is produced by the anaerobic microbiological activity within the landfill material. Worldwide methane emissions from landfills are estimated at 35–73 Tg of the total 598 Tg per year [9]. Because methane is a greenhouse gas (GHG) with commercial value, a permanent effort has been made to capture and use it as a source of energy [10]. Until recently, it has been primarily used for electricity generation and direct heating, and to a lesser degree, as a pipeline gas with injection in distribution networks