Mitigation of methane and trace gas emissions through a large-scale active biofilter system at Glatved landfill, Denmark

Biocover systems are a cost-effective technology utilised to mitigate methane (CH4) and trace gas emissions from landfills. A full-scale biofilter system was constructed at Glatved landfill, Denmark, consisting of three biofilters with total area 3950 m2. Landfill collected mainly shredder waste cells mixed ambient air fed actively into the biofilter, resulting in an average load 60–75 g m?2 d?1 for CH4 0.15–0.21 gases (e.g., aromatics, chlorofluorocarbons (CFCs), aliphatic hydrocarbons). The initial surface screening showed uneven distribution system, elevated concentrations were observed close inlet. Both positive negative fluxes, ranging ?0.36 4.25 d?1, measured across biofilter. Total between ?0.005 0.042 emission flux individual compounds generally small (10?8 10?3 d?1). Vertical concentration profiles that oxidation easily degradable such as aromatics hydrocarbons happened aerobic zones, while CFCs degraded anaerobic zone inside compost layer. In addition, oxidation/degradation also occurred layer, which contributed significantly overall mitigation efficiency system. Overall, efficiencies nearly 100% both gases, it might have potential work under higher loads.