Nitrous Oxide Production and Hydroxylamine Accumulation in a Partial Nitritation Sequencing Batch Reactor: Comparison of Different Operational Strategies.

ABSTRACT: Sequencing batch reactors (SBRs) performing partial nitritation (PN) for treating high-strength ammonium wastewater are known to exhibit elevated levels of nitrous oxide (N₂O) emissions. This study investigated N₂O production and hydroxylamine accumulation in a PN-SBR operated using three distinct strategies. The N₂O emission factor (EF) and net production rate (N2OR) were determined under stable conditions for (i) single feeding with continuous aeration and one microaerobic stage before settling (strategy I), yielding EF = 4.4% and N2OR = 14 mg N g^-1 VSS d^-1; (ii) single feeding with multiple microaerobic stages distributed throughout the cycle (strategy II), yielding EF = 13.5% and N2OR = 85 mg N g^-1 VSS d^-1; an

SUBMITTER: Olmo L 

PROVIDER: S-EPMC12798732 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature