Effect of the carbon source on N2O emissions during biological denitrification

Adouani, Nouceiba; Lendormi, Thomas; Limousy, Lionel; Sire, Olivier

doi:10.1016/j.resconrec.2009.07.011

Cited by 72 publications

(25 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Factors affecting N2O emission during nitrification and denitrification include DO (or aeration rate), SRT, NO2-N, intermittent aeration operating mode, the NH4-N loading rate, and so on [14][15][16][17][18][19]. During treatment of high ammonium containing wastewater, achieving nitritation means the production of high concentrations of nitrite, which may lead to increased N2O emission [14].…”

Section: Introductionmentioning

confidence: 99%

Nitritation and N2O Emission in a Denitrification and Nitrification Two-Sludge System Treating High Ammonium Containing Wastewater

Zheng

Xing

2014

Water

View full text Add to dashboard Cite

Abstract:The effective management of high ammonium containing wastewater is important for the sustainable development of the wastewater industry. A pre-denitrification and post-nitrification two-sludge system was proposed to treat high ammonium containing wastewater with low carbon-to-nitrogen (C/N) ratios. In the system, pre-denitrification was adopted to use organic carbon in raw wastewater efficiently for nitrogen removal, while post-nitrification was adopted to achieve nitritation. System performance and the characteristics of nitrous oxide (N2O) emission were examined. As to the influent chemical oxygen demand (COD) and ammonium nitrogen (NH4-N) concentration, both 800 mg/L, nitrogen removal was mainly through pre-denitrification, and the nitrogen removal percentage was 43.4%. In post-nitrification, nitritation was achieved with a nitrite accumulation efficiency of 97.8% and a NH4-N removal loading rate of 0.45 g/(L·d). With nitrite as the electron acceptor during denitrification, its removal rate increased, while the N2O emission factor decreased with increasing C/N ratios. Nitrification was affected significantly by the aeration rate. When the aeration rate was below 0.6 L/min, the NH4-N removal rate increased, while the N2O emission rate decreased with increasing aeration rates. However, when the aeration rate was above 0.6 L/min, it had little influence on N2O OPEN ACCESSWater 2014, 6 2979 emission. During nitrification, N2O emission factors decreased exponentially with increasing ammonium oxidation rates.

show abstract

Section: Introductionmentioning

confidence: 99%

Nitritation and N2O Emission in a Denitrification and Nitrification Two-Sludge System Treating High Ammonium Containing Wastewater

Zheng

Xing

2014

Water

View full text Add to dashboard Cite

show abstract

“…The WWTPs are one of the major sources of organics. Many parameters such as a substrate concentration, a C/N ratio, a type of carbon source, a nitrite accumulation and an NO concentration influence the N 2 O production (Adouani et al, 2010). The knowledge about the links between the waste water treatment line design and the structure of N 2 O-utilizing bacteria communities in the biomass would allow engineers to apply the purification strategy favouring the effective reduction of the greenhouse gas emission.…”

Section: Discussionmentioning

confidence: 99%

Understanding the efficacy of influent waste water on microbial community structure of activated sludge process

Shah¹

2015

Afr. J. Biotechnol.

View full text Add to dashboard Cite

The assembling of microbial consortia in wastewater treatment facilities is a significance of environmental conditions. In the present research work, activated sludge from different wastewater treatment plants (WWTPs) were exploited at a molecular level to determine the influence of the complexity of the influent composition on the species structure and the diversity of bacterial consortia. The community fingerprints and technological data were subjected to the canonical correspondence and correlation analyses. The number of separated biological processes realized in the treatment line and the presence of industrial wastewater in the influent were the key factors determining the species structure of total and ammoniaoxidizing bacteria in biomass. The N 2 O-reducers community composition depended significantly on the design of the facility; the highest species richness of denitrifiers was noted in the WWTPs with separated denitrification tanks. The contribution of industrial streams to the inflow affected the diversity of total and denitrifying bacterial consortia and diminished the diversity of ammonia oxidizers. The obtained data are valuable for engineers since they revealed the main factors, including the design of wastewater treatment plant, influencing the microbial groups critical for the stability of purification processes.

show abstract

“…Most previous studies have focused on the N 2 O released by nitrification or denitrification processes in continuous stirred tank reactors (Adouani et al 2010;Kampschreur et al 2009;Lu et al 2011) and in sequencing batch reactor (SBR) systems, where nitrification and denitrification are alternated under different redox conditions by turning the aeration on and off Pan et al 2014). However, little is known about N 2 O emissions from MLE processes, despite their relevance in mitigating N 2 O emission.…”

Section: Introductionmentioning

confidence: 99%

Effects of aeration and internal recycle flow on nitrous oxide emissions from a modified Ludzak–Ettinger process fed with glycerol

Song

Suenaga

Harper

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

Nitrous oxide (N2O) is emitted from a modified Ludzak-Ettinger (MLE) process, as a primary activated sludge system, which requires mitigation. The effects of aeration rates and internal recycle flow (IRF) ratios on N2O emission were investigated in an MLE process fed with glycerol. Reducing the aeration rate from 1.5 to 0.5 L/min increased gaseous the N2O concentration from the aerobic tank and the dissolved N2O concentration in the anoxic tank by 54.4 and 53.4 %, respectively. During the period of higher aeration, the N2O-N conversion ratio was 0.9 % and the potential N2O reducers were predominantly Rhodobacter, which accounted for 21.8 % of the total population. Increasing the IRF ratio from 3.6 to 7.2 decreased the N2O emission rate from the aerobic tank and the dissolved N2O concentration in the anoxic tank by 56 and 48 %, respectively. This study suggests effective N2O mitigation strategies for MLE systems.

show abstract

Effect of the carbon source on N2O emissions during biological denitrification

Cited by 72 publications

References 12 publications

Nitritation and N2O Emission in a Denitrification and Nitrification Two-Sludge System Treating High Ammonium Containing Wastewater

Nitritation and N2O Emission in a Denitrification and Nitrification Two-Sludge System Treating High Ammonium Containing Wastewater

Understanding the efficacy of influent waste water on microbial community structure of activated sludge process

Effects of aeration and internal recycle flow on nitrous oxide emissions from a modified Ludzak–Ettinger process fed with glycerol

Contact Info

Product

Resources

About