Impact of free nitrous acid shock and dissolved oxygen limitation on nitritation maintenance and nitrous oxide emission in a membrane bioreactor

2019 ◽  
Vol 660 ◽  
pp. 11-17 ◽  
Author(s):  
Yishuai Jiang ◽  
Leong Soon Poh ◽  
Choon-Ping Lim ◽  
Wun Jern Ng
Keyword(s):  
Nitrous Oxide ◽  
Dissolved Oxygen ◽  
Nitrous Acid ◽  
Membrane Bioreactor ◽  
Oxygen Limitation ◽  
Nitrous Oxide Emission ◽  
Free Nitrous Acid ◽  
Acid Shock

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

Influence of carbon to nitrogen ratio on nitrous oxide emission in an Integrated Fixed Film Activated Sludge Membrane BioReactor plant

2018 ◽  
Vol 176 ◽  
pp. 1078-1090 ◽  
Author(s):  
Giorgio Mannina ◽  
George A. Ekama ◽  
Marco Capodici ◽  
Alida Cosenza ◽  
Daniele Di Trapani ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Activated Sludge ◽  
Membrane Bioreactor ◽  
Nitrous Oxide Emission ◽  
Carbon To Nitrogen Ratio ◽  
Fixed Film ◽  
Nitrogen Ratio

scholarly journals Effect of Free Nitrous Acid on Nitrous Oxide Production and Denitrifying Phosphorus Removal by Polyphosphorus-Accumulating Organisms in Wastewater Treatment

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Zhijia Miao ◽  
Duo Li ◽  
Shan Guo ◽  
Zhirui Zhao ◽  
Xiaofeng Fang ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Phosphorus Removal ◽  
Nitrous Acid ◽  
Phosphorus Uptake ◽  
Complete Removal ◽  
Phosphorus Metabolism ◽  
Biological Phosphorus Removal ◽  
Denitrifying Phosphorus Removal ◽  
Free Nitrous Acid ◽  
Nitrous Oxide Production

The inhibition of free nitrous acid (FNA) on denitrifying phosphorus removal has been widely reported for enhanced biological phosphorus removal; however, few studies focus on the nitrous oxide (N2O) production involved in this process. In this study, the effects of FNA on N2O production and anoxic phosphorus metabolism were investigated using phosphorus-accumulating organisms (PAOs) culture highly enriched (91±4%) inCandidatus Accumulibacter phosphatis. Results show that the FNA concentration notably inhibited anoxic phosphorus metabolism and phosphorus uptake. Poly-β-hydroxyalkanoate (PHA) degradation was completely inhibited when the FNA concentration was approximately 0.0923 mgHNO2-N/L. Higher initial FNA concentrations (0.00035 to 0.0103 mgHNO2-N/L) led to more PHA consumption/TN (0.444 to 0.916 mmol-C/(mmol-N·gVSS)). Moreover, it was found that FNA, rather than nitrite and pH, was likely the true inhibitor of N2O production. The highest proportion of N2O to TN was 78.42% at 0.0031 mgHNO2-N/L (equivalent to 42.44 mgNO2-N/L at pH 7.5), due to the simultaneous effects of FNA on the subsequent conversion of NO2into N2O and then into N2. The traditional nitrite knee point can only indicate the exhaustion of nitrite, instead of the complete removal of TN.

Nitrous oxide emission in a University of Cape Town membrane bioreactor: The effect of carbon to nitrogen ratio

2017 ◽  
Vol 149 ◽  
pp. 180-190 ◽  
Author(s):  
Giorgio Mannina ◽  
Marco Capodici ◽  
Alida Cosenza ◽  
Daniele Di Trapani ◽  
Mark C.M. van Loosdrecht
Keyword(s):  
Nitrous Oxide ◽  
Membrane Bioreactor ◽  
Cape Town ◽  
Nitrous Oxide Emission ◽  
Carbon To Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
University Of Cape Town
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