Effect of PHB and oxygen uptake rate on nitrous oxide emission during simultaneous nitrification denitrification process

Jia, Wenlin; Zhang, Jian; Xie, Huijun; Yan, Yujie; Wang, Jinhe; Zhao, Yongxin; Xu, Xin

doi:10.1016/j.biortech.2011.10.095

Cited by 61 publications

(21 citation statements)

References 30 publications

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“…Moreover, N 2 O generation in AO-SBR was also found to be lower than that in the study of Jia et al [30]. This may be attributed to the difference of carbon source.…”

Section: Causes Of Low N 2 O Generation In N-sbrcontrasting

confidence: 61%

“…This may be attributed to the difference of carbon source. In this study propionate was used as carbon source, whereas Jia et al [30] using acetate and glucose. It has been reported that the use of [31] also found that the N 2 O emission was decreased in a laboratory-scale composting experiment with the addition of NOB, and the main reason was supposed to be the added NOB preventing NO 2 -accumulation.…”

Section: Causes Of Low N 2 O Generation In N-sbrmentioning

confidence: 99%

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N2O reduction during municipal wastewater treatment using a two-sludge SBR system acclimatized with propionate

Liu

Liang

Zhang

et al. 2013

Chemical Engineering Journal

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“…Moreover, N 2 O generation in AO-SBR was also found to be lower than that in the study of Jia et al [30]. This may be attributed to the difference of carbon source.…”

Section: Causes Of Low N 2 O Generation In N-sbrcontrasting

confidence: 61%

Section: Causes Of Low N 2 O Generation In N-sbrmentioning

confidence: 99%

N2O reduction during municipal wastewater treatment using a two-sludge SBR system acclimatized with propionate

Liu

Liang

Zhang

et al. 2013

Chemical Engineering Journal

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“…This lead to a low biological phosphorus removal efficiency achieved during experiments (25% on average). Several studies reported that N 2 O rather than N 2 was the major denitrification product when DPAOs used poly-bhydroxyalkanoates (PHA) as a carbon source for denitrification during denitrifying P removal process (Lemaire et al, 2006;Jia et al, 2012;Wang et al, 2015). In this context, N 2 O production can be expected to be significantly influenced, since the synthesis of anaerobic PHA is significantly affected by the influent quality variation.…”

Section: Resultsmentioning

confidence: 99%

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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“…That is to say, the conditions for the establishment of the SND are favored in R2. At the same time, the zeolite will allow for in R2, on a microenvironmental scale, the adequate microbial ecological morphology for the concurrent coexistence of nitrifying and denitrifying microorganisms within the same floccules, allowing for the boosting of SND metabolism in comparison with R1 (Chiu et al 2007;Zhang et al 2009;Jia et al 2011;Verma et al 2013). The implications of the symbiont coexistence probably lie in that both microbial groups would establish a more expedited link for the metabolic pathways of the oxidation of ammonium and reduction of nitrate/nitrite, favoring the biological process of SND.…”

Section: Ammonium Removalmentioning

confidence: 99%

“…This can be explained by the rapid penetration of CODs in the microbial flocs and/or by its storage in the form of slow biodegradability matter such as in the internal structure of polyhydroxybutyrate (PHB) (Chiu et al 2007;Zhang et al 2009;Jia et al 2011;Verma et al 2013). …”

Section: Snd-sbr Kineticsmentioning

confidence: 99%

Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

Guerrero

Montalvo

Huiliñir

et al. 2016

Int. J. Environ. Sci. Technol.

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One of the technologies used for wastewater nitrogen removal consists in simultaneous nitrificationdenitrification. The low microbial growth rate and the low availability of organic material for the denitrification stage make it necessary to study new operational conditions and the use of microbial supports. The aim of this study was to evaluate the operational behavior of a simultaneous nitrification-denitrification process in a sequential batch reactor utilizing zeolite as a biomass support and step-feed strategy. Two reactors of 2 L were used, one with zeolite and another without zeolite, both operated at constant temperature (31°C), varying nitrogen loading rate (NLR) from 0.041 to 0.113 kg total Kjeldahl nitrogen (TKN/m 3 /day). After 209 days, removals higher than 86 and 96 % in nitrogen compounds and organic matter were obtained, respectively. There was not accumulation of nitrate and nitrite in any case; this means that there was a simultaneous nitrification-denitrification in the reactors. The incorporation of zeolite in the system held higher concentration of biomass in the reactor; this led to reduce start-up to 21 days and to improve 11.31 % removal kinetic. The use of a stepfeed strategy prevents events of inhibition by substrate, even duplicating tolerance to higher NLR for the same operation time.

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Effect of PHB and oxygen uptake rate on nitrous oxide emission during simultaneous nitrification denitrification process

Cited by 61 publications

References 30 publications

N2O reduction during municipal wastewater treatment using a two-sludge SBR system acclimatized with propionate

N2O reduction during municipal wastewater treatment using a two-sludge SBR system acclimatized with propionate

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

Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

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