Methane biofiltration for the treatment of a simulated diluted biogas emission containing ammonia and hydrogen sulfide

•Fugitive CH4 emissions can be treated by using biofilters.•The ammonium tolerance ability is different between methanotrophs.•Secondary pollutants, NH3 and H2S, may cause inhibition for biological CH4 oxidation.•Biofiltration system was affected by the presence of NH3 and H2S.•Methanotrophs in biofilters was verified by both genetic and physiologic traits.