Multi-species nitrifying biofilm model (MSNBM) including free ammonia and free nitrous acid inhibition and oxygen limitation

2010 ◽  
pp. n/a-n/a ◽  
Author(s):  
Seongjun Park ◽  
Wookeun Bae ◽  
Bruce E. Rittmann
Keyword(s):  
Nitrous Acid ◽  
Oxygen Limitation ◽  
Acid Inhibition ◽  
Free Ammonia ◽  
Free Nitrous Acid ◽  
Biofilm Model

scholarly journals Response of poly-phosphate accumulating organisms to free nitrous acid inhibition under anoxic and aerobic conditions

2012 ◽  
Vol 116 ◽  
pp. 340-347 ◽  
Author(s):  
Yan Zhou ◽  
Lily Ganda ◽  
Melvin Lim ◽  
Zhiguo Yuan ◽  
Wun Jern Ng
Keyword(s):  
Nitrous Acid ◽  
Acid Inhibition ◽  
Free Nitrous Acid ◽  
Aerobic Conditions

Achieving nitrogen removal via nitrite pathway from urban landfill leachate using the synergetic inhibition of free ammonia and free nitrous acid on nitrifying bacteria activity

2013 ◽  
Vol 68 (9) ◽  
pp. 2035-2041 ◽  
Author(s):  
H. W. Sun ◽  
Y. Bai ◽  
Y. Z. Peng ◽  
H. G. Xie ◽  
X. N. Shi
Keyword(s):  
Landfill Leachate ◽  
Biological System ◽  
Nitrous Acid ◽  
Free Ammonia ◽  
Nitrifying Bacteria ◽  
Anaerobic Sludge ◽  
Nitrite Accumulation ◽  
Fish Analysis ◽  
Ammonia Oxidizing Bacteria ◽  
Free Nitrous Acid

In this study, a biological system consisting of an up-flow anaerobic sludge blanket (UASB) and anoxic–oxic (A/O) reactor was established for the advanced treatment of high ammonium urban landfill leachate. The inhibitory effect of free ammonia (FA) and free nitrous acid (FNA) on the nitrifying bacterial activity was used to achieve stable nitritation in the A/O reactor. The results demonstrated that the biological system achieved chemical oxygen demand (COD), total nitrogen (TN) and NH4+-N removal efficiencies of 95.3, 84.6 and 99.2%, respectively at a low carbon-to-nitrogen ratio of 3:1. Simultaneous denitritation and methanogenesis in the UASB could improve the removal of COD and TN. Nitritation with above 90% nitrite accumulation was successfully achieved in the A/O reactor by synergetic inhibition of FA and FNA on the activity of nitrite oxidizing bacteria (NOB). Fluorescence in situ hybridization (FISH) analysis showed that ammonia oxidizing bacteria (AOB) was dominant and was considered to be responsible for the satisfactory nitritation performance.

scholarly journals Achieving Stable Nitritation for Mainstream Deammonification by Combining Free Nitrous Acid-Based Sludge Treatment and Oxygen Limitation

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Dongbo Wang ◽  
Qilin Wang ◽  
Andrew Laloo ◽  
Yifeng Xu ◽  
Philip L. Bond ◽  
...  
Keyword(s):  
Nitrous Acid ◽  
Oxygen Limitation ◽  
Free Nitrous Acid ◽  
Sludge Treatment
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