Full-Scale Modeling Explaining Large Spatial Variations of Nitrous Oxide Fluxes in a Step-Feed Plug-Flow Wastewater Treatment Reactor

2015 ◽  
Vol 49 (15) ◽  
pp. 9176-9184 ◽  
Author(s):  
Bing-Jie Ni ◽  
Yuting Pan ◽  
Ben van den Akker ◽  
Liu Ye ◽  
Zhiguo Yuan
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Plug Flow ◽  
Spatial Variations ◽  
Full Scale ◽  
Scale Modeling

Mathematical Modeling of Nitrous Oxide (N2O) Emissions from Full-Scale Wastewater Treatment Plants

2013 ◽  
Vol 47 (14) ◽  
pp. 7795-7803 ◽  
Author(s):  
Bing-Jie Ni ◽  
Liu Ye ◽  
Yingyu Law ◽  
Craig Byers ◽  
Zhiguo Yuan
Keyword(s):  
Mathematical Modeling ◽  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Full Scale ◽  
N2o Emissions

Oxygen-induced dynamics of nitrous oxide in water and off-gas during the treatment of digester supernatant

2013 ◽  
Vol 69 (1) ◽  
pp. 84-91 ◽  
Author(s):  
F. Stenström ◽  
K. Tjus ◽  
J. la Cour Jansen
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Oxygen Concentration ◽  
Total Nitrogen ◽  
Batch Reactor ◽  
Full Scale ◽  
Bulk Liquid ◽  
N2o Emissions ◽  
Low Oxygen ◽  
Low Oxygen Concentration

Nitrous oxide (N2O) is a potent greenhouse gas and of special concern in wastewater treatment. It is formed in biological wastewater treatment under both aerobic and anaerobic conditions. A major reason for high N2O emissions is low oxygen concentration during nitrification. In this full-scale study of N2O emissions from a sequencing batch reactor for treating digester supernatant, the oxygen concentration was reduced stepwise to investigate how N2O emissions were influenced. N2O concentrations were measured online in water and off-gas. A distinct relationship was found between low oxygen concentration and high N2O emissions. N2O was formed in water during both nitrification and denitrification. Decreased oxygen concentration during nitrification led to increased nitrite concentration, which in turn led to increased N2O concentration in the subsequent denitrification phase. When the nitrification resumed, accumulated N2O was stripped off to the atmosphere. Very high concentrations of N2O, over 56,000 ppmv, were measured in the off-gas. Furthermore, the maximum amount of N2O emitted during one cycle corresponded to 107.6% of the total nitrogen load (21.9% of total nitrogen present in the bulk liquid at the beginning of the cycle). This is among the highest emission levels ever measured from a full-scale municipal plant for digester supernatant.

Mitigating nitrous oxide emissions at a full-scale wastewater treatment plant

2020 ◽  
Vol 185 ◽  
pp. 116196 ◽  
Author(s):  
Haoran Duan ◽  
Ben van den Akker ◽  
Benjamin J. Thwaites ◽  
Lai Peng ◽  
Caroline Herman ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Full Scale ◽  
Nitrous Oxide Emissions

scholarly journals Development of an Extended ASM3 Model for Predicting the Nitrous Oxide Emissions in a Full-Scale Wastewater Treatment Plant

2018 ◽  
Vol 52 (10) ◽  
pp. 5803-5811 ◽  
Author(s):  
Kati Blomberg ◽  
Pascal Kosse ◽  
Anna Mikola ◽  
Anna Kuokkanen ◽  
Tommi Fred ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Full Scale ◽  
Nitrous Oxide Emissions
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