Nitrous oxide production in completely autotrophic nitrogen removal biofilm process: a simulation study

Peng, Lai, Liu, Yiwen and Ni, Bing-Jie (2016) Nitrous oxide production in completely autotrophic nitrogen removal biofilm process: a simulation study. Chemical Engineering Journal, 287 217-224. doi:10.1016/j.cej.2015.11.026


Author Peng, Lai
Liu, Yiwen
Ni, Bing-Jie
Title Nitrous oxide production in completely autotrophic nitrogen removal biofilm process: a simulation study
Journal name Chemical Engineering Journal   Check publisher's open access policy
ISSN 1385-8947
1873-3212
Publication date 2016-03-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.cej.2015.11.026
Open Access Status Not Open Access
Volume 287
Start page 217
End page 224
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
The dissolved oxygen (DO) concentration is known to be one of the most important factors affecting nitrous oxide (N2O) production, which might weaken the advantages of nitrogen removal in completely autotrophic nitrogen removal biofilm process. In this work, a mathematical model is applied to study the N2O production in a biofilm reactor performing nitritation followed by anaerobic ammonium oxidation (Anammox) for nitrogen removal. The nitrifier denitrification pathway through utilization of nitrite as the terminal electron acceptor under oxygen limiting conditions is used to predict N2O production. Simulations explicitly show that a large number of N2O is produced under conditions of low DO concentration for high nitrogen removal. A low ammonium concentration (<50 mg N L−1) and a suitable DO level (at around 0.5 mg O2 L−1) could lead to high total nitrogen (TN) removal with a low N2O production. Biofilm has to be controlled to be in the optimal thickness (1000 μm under the simulating conditions of this study), which allows relatively high TN removal, avoiding higher thickness that favors N2O production.
Keyword Nitrous oxide
Dissolved oxygen
Nitrite
Completely autotrophic nitrogen removal
Ammonia oxidizers (AOB)
Biofilm modeling
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
Advanced Water Management Centre Publications
 
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