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Model-based evaluation of mechanisms and benefits of mainstream shortcut nitrogen removal processes

(2015) WATER SCIENCE AND TECHNOLOGY. 71(6). p.840-847
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Abstract
The main challenge in implementing shortcut nitrogen removal processes for mainstream wastewater treatment is the out-selection of nitrite oxidizing bacteria (NOB) to limit nitrate production. A model-based approach was utilized to simulate the impact of individual features of process control strategies to achieve NO2--N shunt via NOB out-selection. Simulations were conducted using a two-step nitrogen removal model from the literature. Nitrogen shortcut removal processes from two case studies were modeled to illustrate the contribution of NOB out-selection mechanisms. The paper highlights a comparison between two control schemes; one was based on online measured ammonia and the other was based on a target ratio of 1 for ammonia vs. NOx (nitrate + nitrite) (AVN). Results indicated that the AVN controller possesses unique features to nitrify only that amount of nitrogen that can be denitrified, which promotes better management of incoming organics and bicarbonate for a more efficient NOB out-selection. Finally, the model was used in a scenario analysis, simulating hypothetical optimized performance of the pilot process. An estimated potential saving of 60% in carbon addition for nitrogen removal by implementing full-scale mainstream deammonification was predicted.
Keywords
anammox, ammonia oxidizing bacteria (AOB) seeding, mainstream deammonification, NO2--N shunt, NOB out-selection, online control, transient anoxia, DOMESTIC WASTE-WATER, OXIDIZING BACTERIA, LOW-TEMPERATURES, NITRITE, DEAMMONIFICATION, NITRIFICATION

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Chicago
Al-Omari, Ahmed, Bernhard Wett, Ingmar Nopens, Haydee De Clippeleir, Mofei Han, Pusker Regmi, Charles Bott, and Sudhir Murthy. 2015. “Model-based Evaluation of Mechanisms and Benefits of Mainstream Shortcut Nitrogen Removal Processes.” Water Science and Technology 71 (6): 840–847.
APA
Al-Omari, Ahmed, Wett, B., Nopens, I., De Clippeleir, H., Han, M., Regmi, P., Bott, C., et al. (2015). Model-based evaluation of mechanisms and benefits of mainstream shortcut nitrogen removal processes. WATER SCIENCE AND TECHNOLOGY, 71(6), 840–847.
Vancouver
1.
Al-Omari A, Wett B, Nopens I, De Clippeleir H, Han M, Regmi P, et al. Model-based evaluation of mechanisms and benefits of mainstream shortcut nitrogen removal processes. WATER SCIENCE AND TECHNOLOGY. 2015;71(6):840–7.
MLA
Al-Omari, Ahmed, Bernhard Wett, Ingmar Nopens, et al. “Model-based Evaluation of Mechanisms and Benefits of Mainstream Shortcut Nitrogen Removal Processes.” WATER SCIENCE AND TECHNOLOGY 71.6 (2015): 840–847. Print.
@article{5951837,
  abstract     = {The main challenge in implementing shortcut nitrogen removal processes for mainstream wastewater treatment is the out-selection of nitrite oxidizing bacteria (NOB) to limit nitrate production. A model-based approach was utilized to simulate the impact of individual features of process control strategies to achieve NO2--N shunt via NOB out-selection. Simulations were conducted using a two-step nitrogen removal model from the literature. Nitrogen shortcut removal processes from two case studies were modeled to illustrate the contribution of NOB out-selection mechanisms. The paper highlights a comparison between two control schemes; one was based on online measured ammonia and the other was based on a target ratio of 1 for ammonia vs. NOx (nitrate + nitrite) (AVN). Results indicated that the AVN controller possesses unique features to nitrify only that amount of nitrogen that can be denitrified, which promotes better management of incoming organics and bicarbonate for a more efficient NOB out-selection. Finally, the model was used in a scenario analysis, simulating hypothetical optimized performance of the pilot process. An estimated potential saving of 60\% in carbon addition for nitrogen removal by implementing full-scale mainstream deammonification was predicted.},
  author       = {Al-Omari, Ahmed and Wett, Bernhard and Nopens, Ingmar and De Clippeleir, Haydee and Han, Mofei and Regmi, Pusker and Bott, Charles and Murthy, Sudhir},
  issn         = {0273-1223},
  journal      = {WATER SCIENCE AND TECHNOLOGY},
  keyword      = {anammox,ammonia oxidizing bacteria (AOB) seeding,mainstream deammonification,NO2--N shunt,NOB out-selection,online control,transient anoxia,DOMESTIC WASTE-WATER,OXIDIZING BACTERIA,LOW-TEMPERATURES,NITRITE,DEAMMONIFICATION,NITRIFICATION},
  language     = {eng},
  number       = {6},
  pages        = {840--847},
  title        = {Model-based evaluation of mechanisms and benefits of mainstream shortcut nitrogen removal processes},
  url          = {http://dx.doi.org/10.2166/wst.2015.022},
  volume       = {71},
  year         = {2015},
}

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