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The agricultural sector is responsible for an important part of Canadian greenhouse gas (GHG) emissions, 8 % of the 747 Mt eq. CO emitted each year. The pork industry, a key sector of the agrifood industry, has had a rapid growth in Canada since the middle 1980s. For this industry, slurry storage accounts for the major part of methane (CH) emissions, a GHG 25 times higher than carbon dioxide (CO) on a 100-year time horizon. Intending to reduce these emissions, biofiltration, a process effective to treat CH from landfills and coal mines, could be effective to treat CH from the pig industry. Biofiltration is a complex process that requires the understanding of the biological process of CH oxidation and a control of the engineering parameters (filter bed, temperature, etc.). Some biofiltration studies show that this technology could be used to treat CH at a relatively low cost and with a relatively high purification performance. [ABSTRACT FROM AUTHOR]