Fugitive methane emissions impair the physical and chemical stability of the atmosphere. Biological systems, such as biofilters, have been proposed as a feasible technology for the abatement of CH₄ in diluted emissions (<5% [CH₄]). Other gases, such as NH₃ and H₂S, are also present in these emissions; and they could be detrimental for the performance of biological CH₄ abatement strategies. The objective of this work was to establish the magnitude of the impact on the biofiltration of CH₄ due to the presence of NH₃ and H₂S.

A methane biofiltration system operating at load of 10 gCH₄m^-3h⁻¹ was affected by the presence of NH₃ and H₂S in a synthetic diffuse stream, where the elimination capacity (5.5 gCH₄m^-3h⁻¹) and efficiency (55%) varied significantly. A combination of 100 ppmv of NH₃ and 100 ppmv of H₂S decreased the capacity by 17% with respect to the unexposed biofilter while 500 ppmv of NH₃ and 300 ppmv of H₂S shrink the capacity by 26%. Separately, H₂S decreased the methane elimination capacity by 11% under 150 ppmv and 20% when 300 ppmv was supplied. In the case of NH₃, the presence of 100 ppmv and 300 ppmv of NH₃ increases the methane elimination capacity by 35% and 16%, respectively. A reduction of 32% in the elimination capacity was observed under 1000 ppmv of NH₃. We contribute with numerical evidence by which methane biofiltration was affected by secondary gases on a concentration range similar to those in waste methane diffuse stream, establishing the concentration ranges of H₂S and NH₃ at which it is possible to optimize the process of methane biofiltration and under which performance could be reduced.

逸散性甲烷排放会损害大气的物理和化学稳定性。生物系统，例如生物过滤器，已被提议作为减少稀释排放物（<5% [CH ₄ ]）中的 CH _{4的可行技术。}这些排放物中还存在其他气体，例如 NH ₃和 H _{2 S；并且它们可能不利于生物 CH 4}减排策略的性能。这项工作的目的是确定由于 NH ₃和 H ₂ S的存在对 CH ₄生物过滤的影响程度。

_{在 10 gCH 4} m ^-3 h ^-1负荷下运行的甲烷生物过滤系统受到合成扩散流中NH ₃和 H _{2 S 的影响，其中消除能力 (5.5 gCH 4} m ^-3 h ^-1 )和效率 (55%) 差异很大。_{100 ppmv 的 NH 3}和 100 ppmv 的 H ₂ S的组合使未暴露的生物过滤器的容量减少了 17%，而 500 ppmv 的 NH ₃和 300 ppmv 的 H ₂ S 使容量减少了 26%。分别地，H ₂S 使甲烷消除能力在 150 ppmv 下降低了 11%，在提供 300 ppmv 时降低了 20%。_{在 NH 3}的情况下，100 ppmv 和 300 ppmv 的 NH ₃的存在分别使甲烷消除能力增加了 35% 和 16%。_{在 1000 ppmv 的 NH 3}下观察到消除能力降低了 32% 。我们贡献了数值证据，表明甲烷生物过滤受到二次气体的影响，二次气体的浓度范围与废弃甲烷扩散流中的浓度范围相似，确定了可以优化甲烷生物过滤过程的H ₂ S 和 NH ₃的浓度范围并且性能可能会降低。