Trivalent iron (Fe) could participate in methane (CH) oxidation as an electron acceptor under anaerobic conditions, but the kinetic process remains unknown in landfills, and the understanding of metabolic pathway of Fe-dependent anaerobic methane oxidation (Fe-DAMO) is still limited. In this study, the dual-substrate (CH-Fe) kinetic model of CH oxidation is obtained with V (7.35 ± 0.4184)μmol/(kg d), half-saturation constant (16.6699 ± 2.3940)ppmv, and (0.00107 ± 0.0002g/g). Microbial community analysis shows that Methanobacteriales and Clostridia are dominant microorganisms of Fe-DAMO. PICRUSt analysis confirms that the metabolic pathway of AMO is the reverse CH production pathway. The results provide a new perspective for CH biodegradation in landfills and offer a better understanding of Fe-DAMO process.
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