TY - JOUR
T1 - Modeling of Nitrous Oxide Production from Nitritation Reactors Treating Real Anaerobic Digestion Liquor
AU - Wang, Qilin
AU - Ni, Bing-Jie
AU - Lemaire, Romain
AU - Hao, Xiaodi
AU - Yuan, Zhiguo
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2016/4/29
Y1 - 2016/4/29
N2 - In this work, a mathematical model including both ammonium oxidizing bacteria (AOB) and heterotrophic bacteria (HB) is constructed to predict N2 O production from the nitritation systems receiving the real anaerobic digestion liquor. This is for the first time that N2 O production from such systems was modeled considering both AOB and HB. The model was calibrated and validated using experimental data from both lab-and pilot-scale nitritation reactors. The model predictions matched the dynamic N 2 O, ammonium, nitrite and chemical oxygen demand data well, supporting the capability of the model. Modeling results indicated that HB are the dominant contributor to N2 O production in the above systems with the dissolved oxygen (DO) concentration of 0.5-1.0 mg O2/L, accounting for approximately 75% of N2 O production. The modeling results also suggested that the contribution of HB to N2 O production decreased with the increasing DO concentrations, from 75% at DO = 0.5 mg O2/L to 25% at DO = 7.0 mg O2/L, with a corresponding increase of the AOB contribution (from 25% to 75%). Similar to HB, the total N2 O production rate also decreased dramatically from 0.65 to 0.25 mg N/L/h when DO concentration increased from 0.5 to 7.0 mg O2/L.
AB - In this work, a mathematical model including both ammonium oxidizing bacteria (AOB) and heterotrophic bacteria (HB) is constructed to predict N2 O production from the nitritation systems receiving the real anaerobic digestion liquor. This is for the first time that N2 O production from such systems was modeled considering both AOB and HB. The model was calibrated and validated using experimental data from both lab-and pilot-scale nitritation reactors. The model predictions matched the dynamic N 2 O, ammonium, nitrite and chemical oxygen demand data well, supporting the capability of the model. Modeling results indicated that HB are the dominant contributor to N2 O production in the above systems with the dissolved oxygen (DO) concentration of 0.5-1.0 mg O2/L, accounting for approximately 75% of N2 O production. The modeling results also suggested that the contribution of HB to N2 O production decreased with the increasing DO concentrations, from 75% at DO = 0.5 mg O2/L to 25% at DO = 7.0 mg O2/L, with a corresponding increase of the AOB contribution (from 25% to 75%). Similar to HB, the total N2 O production rate also decreased dramatically from 0.65 to 0.25 mg N/L/h when DO concentration increased from 0.5 to 7.0 mg O2/L.
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U2 - 10.1038/srep25336
DO - 10.1038/srep25336
M3 - RGC 21 - Publication in refereed journal
C2 - 27125491
SN - 2045-2322
VL - 6
JO - Scientific Reports
JF - Scientific Reports
M1 - 25336
ER -