Abstract
Although landfills serve as an easy and very economic means for disposing wastes, it poses threat to the environment as it generates both leachate and greenhouse gases, including methane (CH4) and carbon dioxide (CO2). Nowadays, landfills are equipped with gas recovery components thereby making it possible for more methane gas to be collected and used as an alternative source of green energy. Currently, various technologies have been employed in managing landfill sites in order to attenuate environmental degradation; Revegetation technologies, methane oxidation, anaerobic digestion, waste washing and pre-treatment are some of the methods currently used. This review presents an overview of the technologies and methods employed for enhancing landfill gas mitigation and recovery.
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