title: Effect of ammonium on nitrous oxide emission during denitrification with different electron donors.
abstract: Nitrous oxide (N2O) emission during denitrification is receiving intensive attention due to its high potential to cause greenhouse effects. In this study, denitrifiers were acclimated in sequencing batch reactors with methanol or acetate as the electron donor and nitrate as the electron acceptor. The effects of ammonium on N2O emission were examined in batch experiments with various electron donors. With the addition of ammonium, N2O emission increased under all the examined conditions compared to experiments without ammonium addition. With different electron donors, the highest ratio of N2O emission to the removed oxidized nitrogen was 0.70% for methanol, 5.34% for acetate, and 34.79% for polyhydroxybutyrate.
authors.affiliation: Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China. wu.guangxue@sz.tsinghua.edu.cn
authors.forename: Guangxue
authors.initials: G
authors.lastname: Wu
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Zhai
authors.forename: Chengai
authors.initials: C
authors.lastname: Jiang
authors.forename: Yuntao
authors.initials: Y
authors.lastname: Guan
mesh_terms: D000085:Acetates / Q000737:chemistry; D064751:Ammonium Compounds / Q000737:chemistry*; D058440:Denitrification; D000432:Methanol / Q000737:chemistry; D009609:Nitrous Oxide / Q000737:chemistry*
chemical_list: D000085:Acetates; D064751:Ammonium Compounds; D009609:Nitrous Oxide; D000432:Methanol