Biokinetic characteristics of novel N2O-reducing bacteria: Towards mitigation of N2O emissions from WWTPs

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Harnessing of nitrous oxide reducers (N2OR), harbored nosZ gene, can significantly reduce N2O emissions from nitrogen cycles, and deserves more attention. We applied chemostat to enrich N2OR and systematically studied on biokinetic characterizations of mixed cultures, and revealing the dominant species for consuming N2O. The results demonstrated that the mixed culture possessed great potential of N2O consumption activities. Additionally, our results highlighted that the highly active oxygen microbial consortium can be attained by a chemostat fed with methanol. Those findings provide new insights into achieving N2O emissions mitigation by N2OR. In future work, we will continue to focus on how novel N2OR can be applied to practical engineering applications to achieve N2O emission mitigation.