N2O production rate of an enriched ammonia-oxidising bacteria culture exponentially correlates to its ammonia oxidation rate

Law, Yingyu; Ni, Bing‐Jie; Lant, Paul; Yuan, Zhiguo

doi:10.1016/j.watres.2012.03.043

Cited by 208 publications

(218 citation statements)

References 53 publications

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“…The N 2 O flux emitted from the MBR reactor was found to be three times higher than that of the aerobic reactor on average. This result is emphasized since the scientific literature consider the nitrogen transformation process as the main source of nitrous oxide (Kampschreur et al, 2009;Law et al, 2012;Zhao et al, 2014) while in the MBR reactor, due to the low HRT (0.36 h), very little biological activity is expected to occur. The presence in the aerobic reactor of both suspended and attached biomass probably enhanced the gas production thus contributing to the flux emission.…”

Section: Resultsmentioning

confidence: 99%

“…In this context, N 2 O emissions from wastewater treatment has received increasing attention in recent years (Kampschreur et al, 2009;Law et al, 2012;Mannina et al, 2016a). Specifically, N 2 O generation mainly occurs in biological nitrogen removal (BNR) (Cosenza et al, 2013) via nitrification and denitrification processes as both autotrophic and heterotrophic bacteria can be responsible for N 2 O production during BNR (Kampschreur et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…During nitrification, N 2 O may be produced by ammonia oxidizing bacteria (AOB) (Peng et al, 2014 originating via two main pathways (Kampschreur et al, 2009): (1) the reduction of NO 2 À as terminal electron acceptor to N 2 O (AOB denitrification) (Kim et al, 2010;Yu et al, 2010;Wrage et al, 2001;Stuven et al, 1992); (2) incomplete oxidation of hydroxylamine (NH 2 OH) to NO 2 À (Law et al, 2012;Chandran et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The reported studies demonstrated a huge variability of the N 2 O emission (from the 0.01% to 10% of the influent total nitrogen) (Yoshida et al, 2014), depending on the WWTPs operational conditions (Kampschreur et al, 2009;Law et al, 2012;Daelman et al, 2013). Moreover, the technical literature shows that in processes aimed at the simultaneous nitrogen and phosphorous removal (SNPR), the role of polyphosphate accumulating organisms (PAOs) in the production of N 2 O cannot be disregarded (among others, Zhou et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Nitrous oxide from moving bed based integrated fixed film activated sludge membrane bioreactors

Mannina

Capodici

Cosenza

et al. 2017

Journal of Environmental Management

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a b s t r a c tThe present paper reports the results of a nitrous oxide (N 2 O) production investigation in a moving bed based integrated fixed film activated sludge (IFAS) membrane bioreactor (MBR) pilot plant designed in accordance with the University of Cape Town layout for biological phosphorous removal. Gaseous and liquid samples were collected in order to measure the gaseous as well as the dissolved concentration of N 2 O. Furthermore, the gas flow rate from each reactor was measured and the gas flux was estimated. The results confirmed that the anoxic reactor represents the main source of nitrous oxide production. A significant production of N 2 O was, however, also found in the anaerobic reactor, thus indicating a probable occurrence of the denitrifying phosphate accumulating organism activity. The highest N 2 O fluxes were emitted from the aerated reactors (3.09 g N 2 OeN m À2 h À1 and 9.87 g N 2 OeN m À2 h À1 , aerobic and MBR tank, respectively). The emission factor highlighted that only 1% of the total treated nitrogen was emitted from the pilot plant. Furthermore, the measured N 2 O concentrations in the permeate flow were comparable with other reactors. Nitrous oxide mass balances outlined a moderate production also in the MBR reactor despite the low hydraulic retention time. On the other hand, the mass balance showed that in the aerobic reactor a constant consumption of nitrous oxide (up to almost 15 mg N 2 O h À1 ) took place, due to the high amount of stripped gas.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nitrous oxide from moving bed based integrated fixed film activated sludge membrane bioreactors

Mannina

Capodici

Cosenza

et al. 2017

Journal of Environmental Management

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“…These authors found that SBR cycle configurations reducing N 2 O emissions resulted in an increase of NO, highlighting the importance of monitoring both gases simultaneously. Also, the relationships between the ammonia oxidation rate and the NO and N 2 O production rates have been reported, being linear (Stüven and Bock 2001) and exponential (Law et al 2012), respectively.…”

Section: Introductionmentioning

confidence: 96%

Effect of Temperature on N2O and NO Emission in a Partial Nitrification SBR Treating Reject Wastewater

Bao

Midulla

Ribera-Guarida

et al. 2017

Lecture Notes in Civil Engineering

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Abstract. Temperature is a very important parameter during nitritation, having a direct effect on ammonia oxidation rate (AOR) and enzymatic activities which relate to both N 2 O and NO emission. This study aims at investigating the effect of temperature on AOR, N 2 O and NO production in an enriched ammonia oxidizing bacteria (AOB) sequencing batch reactor (SBR) performing partial nitrification (PN) of synthetic reject wastewater. To achieve that, a SBR was subject to several shifts in temperature (in the range of 30 to 15°C, 5°C for each decrease). Cycle studies, which contain two aeration phases, were conducted under each temperature. The results showed that AOR specific exponentially correlates with the temperature during the temperature decreasing experiments. With the decrease of the temperature, N 2 O firstly increased and then dropped to very low levels along with the decrease of the AOR, unlike NO that did not show any apparent connection with the temperature.

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Bioprocesses for the Removal of Nitrogen Oxides

Yao

Guo

Frutos

et al. 2013

Air Pollution Prevention and Control

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N2O production rate of an enriched ammonia-oxidising bacteria culture exponentially correlates to its ammonia oxidation rate

Cited by 208 publications

References 53 publications

Nitrous oxide from moving bed based integrated fixed film activated sludge membrane bioreactors

Nitrous oxide from moving bed based integrated fixed film activated sludge membrane bioreactors

Effect of Temperature on N2O and NO Emission in a Partial Nitrification SBR Treating Reject Wastewater

Bioprocesses for the Removal of Nitrogen Oxides

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