Journal
SUSTAINABILITY
Volume 12, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/su12083203
Keywords
biofilter; biowindow; landfill gas; compost; methane oxidation; odor mitigation
Funding
- EU LIFE Program [LIFE RE Mida-LIFE14 CCM/IT/000464]
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Biofiltration systems are emerging technological solutions for the removal of methane and odors from landfill gas when flaring is no longer feasible. This work analyzed and compared two full-scale biofiltration systems: biofilter and biowindows. The emission mitigation of methane, non-methane volatile organic compounds (NMVOCs) and odors during a two-year management and monitoring period was studied. In addition to diluted methane, more than 50 NMVOCs have been detected in the inlet raw landfill gas and the sulfur compounds resulted in the highest odor activity value. Both systems, biofilter and biowindows, were effective for the oxidation of methane (58.1% and 88.05%, respectively), for the mitigation of NMVOCs (higher than 80%) and odor reduction (99.84% and 93.82% respectively). As for the biofilter monitoring, it was possible to define the oxidation efficiency trend and in fact to guarantee that for an oxidation efficiency of 80%, the methane load must be less than 6.5 g CH4/m(2)h with an oxidation rate of 5.2 g CH4/m(2)h.
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