TY - JOUR
T1 - Unraveling the source of nitric oxide emission during nitrification
AU - Kampschreur, Marlies J.
AU - Picioreanu, Cristian
AU - Tan, Nico
AU - Kleerebezem, Robbert
AU - Jetten, Mike S.M.
AU - Van Loosdrecht, Mark C.M.
N1 - Generated from Scopus record by KAUST IRTS on 2022-09-13
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Nitric oxide production was measured during nitrification in a laboratory-scale bioreactor, operated at conditions relevant to municipal nitrifying wastewater treatment plants. This study aims to determine which type of microorganism and which metabolic pathway is responsible for nitric oxide emission during nitrification. Simulation studies were used to identify which pathway is the main source of nitric oxide emission, based on the following three hypothetical pathways for nitric oxide emission: (a) nitrification, (b) denitrification by ammonia-oxidizing bacteria with ammonium as electron donor, and (c) heterotrophic denitrification. The results of the study suggest that, in a nitrifying reactor treating wastewater containing solely ammonium and nutrients, denitrification by ammoniaoxidizing bacteria is the main nitric-oxide-producing pathway. During the experiments, 0.025% of the treated ammonium is emitted as nitric oxide, independent of the aeration rate imposed. Nitrite presence and oxygen limitation were found to increase the nitric oxide emission.
AB - Nitric oxide production was measured during nitrification in a laboratory-scale bioreactor, operated at conditions relevant to municipal nitrifying wastewater treatment plants. This study aims to determine which type of microorganism and which metabolic pathway is responsible for nitric oxide emission during nitrification. Simulation studies were used to identify which pathway is the main source of nitric oxide emission, based on the following three hypothetical pathways for nitric oxide emission: (a) nitrification, (b) denitrification by ammonia-oxidizing bacteria with ammonium as electron donor, and (c) heterotrophic denitrification. The results of the study suggest that, in a nitrifying reactor treating wastewater containing solely ammonium and nutrients, denitrification by ammoniaoxidizing bacteria is the main nitric-oxide-producing pathway. During the experiments, 0.025% of the treated ammonium is emitted as nitric oxide, independent of the aeration rate imposed. Nitrite presence and oxygen limitation were found to increase the nitric oxide emission.
UR - http://doi.wiley.com/10.2175/106143007X220815
UR - http://www.scopus.com/inward/record.url?scp=39849102118&partnerID=8YFLogxK
U2 - 10.2175/106143007X220815
DO - 10.2175/106143007X220815
M3 - Article
SN - 1554-7531
VL - 79
SP - 2499
EP - 2509
JO - Water Environment Research
JF - Water Environment Research
IS - 13
ER -