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Nitrous oxide (N2O) production pathway in a signal-stage nitritation-anammox sequencing batch reactor (SBR) was investigated based on a multilateral approach including real-time N2O monitoring, N2O isotopic composition analysis, and in-situ analyses of spatial distribution of N2O production rate and microbial populations in granular biomass. N2O emission rate was high in the initial phase of the operation...
In this study, partial nitrifying (PN) aerobic granules were developed in a sequencing batch airlift reactor by controlling the airflow rate and NH4+ loading rate. The PN reactor produced an effluent with a NO2-/NH4+ ratio of approximately one and with an NH4+ conversion rate of 1.22kgNm −3 day −1 . More than 95% of the total organic carbon was removed during the process. On the basis...
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