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2016•Environmental Engineering and Management JournalOpen access

NITROUS OXIDE EMISSION DURING NITRIFICATION OF INFLUENTS WITH DIFFERENT AMMONIUM CONCENTRATIONS

Guangxue Wu, Enge Wang, Lizhen Xing, Yuntao Guan

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Abstract

As the serious effect of climate change and global warming is recognized, nitrous oxide (N2O) emission during wastewater treatment is receiving lots of attention due to its high potential to greenhouse effect.In this study, nitrifiers were acclimated in sequencing batch reactors with influent ammonium nitrogen (NH4-N) concentrations of 60 mg/L (SBR60) and 180 mg/L (SBR180), respectively.Nitrous oxide emission during nitrification was examined in both typical cycles and batch experiments.The dominant ammonia oxidizing bacteria (AOB) of the enriched nitrifiers in both reactors were from Nitrosomonas oligotropha lineage.For the enriched nitrifiers, N2O emission during nitrification was mainly due to activities of AOB.Within typical cycles, the conversion ratio of the produced N2O to the removed NH4-N was 5.2% in SBR60 and 1.6% in SBR180.

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What this paper is about

As the serious effect of climate change and global warming is recognized, nitrous oxide (N2O) emission during wastewater treatment is receiving lots of attention due to its high potential to greenhouse effect.In this study, nitrifiers were acclimated in sequencing batch reactors with influent ammonium nitrogen (NH4-N) concentrations of 60 mg/L (SBR60) and 180 mg/L (SBR180), respectively.Nitrous oxide emission during nitrification was examined in both typical cycles and batch experiments.The dominant ammonia oxidizing bacteria (AOB) of the enriched nitrifiers in both reactors were from Nitrosomonas oligotropha lineage.For the enriched nitrifiers, N2O emission during nitrification was mainly due to activities of AOB.Within typical cycles, the conversion ratio of the produced N2O to the removed NH4-N was 5.2% in SBR60 and 1.6% in SBR180.

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Available abstract

As the serious effect of climate change and global warming is recognized, nitrous oxide (N2O) emission during wastewater treatment is receiving lots of attention due to its high potential to greenhouse effect.In this study, nitrifiers were acclimated in sequencing batch reactors with influent ammonium nitrogen (NH4-N) concentrations of 60 mg/L (SBR60) and 180 mg/L (SBR180), respectively.Nitrous oxide emission during nitrification was examined in both typical cycles and batch experiments.The dominant ammonia oxidizing bacteria (AOB) of the enriched nitrifiers in both reactors were from Nitrosomonas oligotropha lineage.For the enriched nitrifiers, N2O emission during nitrification was mainly due to activities of AOB.Within typical cycles, the conversion ratio of the produced N2O to the removed NH4-N was 5.2% in SBR60 and 1.6% in SBR180.

Key concepts: Nitrous oxide, Nitrification, Ammonium, Environmental chemistry, Environmental science, Chemistry, Environmental engineering, Nitrogen

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