Effect of operational modes on nitrogen removal and nitrous oxide emission in the process of simultaneous nitrification and denitrification

Zhang, Fang; Li, Ping; Chen, Mengsi; Wu, Jinhua; Zhu, Nengwu; Wu, Pingxiao; Chiang, Pen‐Chi; Hu, Zhiqiang

doi:10.1016/j.cej.2015.06.016

Cited by 69 publications

(9 citation statements)

References 47 publications

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“…From a theoretical point of view, microbial nitrification and denitrification in soils, especially the simultaneous nitrification-denitrification processes under low oxygen conditions, were widely acknowledged to be the most crucial mechanism that was related to a significant amount of N 2 O emission 22 23 24 . Considerable studies have been launched to determine the factors that are influencing soil N 2 O emission during nitrification and denitrification processes, including soil temperature, moisture, carbon source, COD/ ratio and nitrite accumulation 25 26 27 . Therefore, identification, analysis and evaluation of the relevant processes such as microbial nitrification, denitrification and respiration in soils are desired not only for mitigating greenhouse gas (GHG) emissions, but also for reducing losses of nutrients in soils and retain effective utilization of fertilizers in agricultural sector 2 3 .…”

mentioning

confidence: 99%

Microbial nitrification, denitrification and respiration in the leached cinnamon soil of the upper basin of Miyun Reservoir

Cai

Zhang

et al. 2017

Sci Rep

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Leached cinnamon soil is the main agricultural soil distributed in the North China Plain. In this research, leached cinnamon soil samples were collected in the upper basin of Miyun Reservoir (northeast of Beijing, China). The BaPS method (Barometric Process Separation) was applied to measure nitrification, denitrification and respiration rates. The rates of nitrification, denitrification and respiration were 0–120.35 μg N/kg SDW h, 0–246.86 μg N/kg SDW h and 0.17–225.85 μg C/kg SDW h (Soil Dry Weight, SDW), respectively. The emission rates of CO2 and NxOy through nitrification, denitrification and respiration were 1.00–547.80 and 6.00–4850.65 μmol/h, respectively. The analysis of relationships between nitrification, denitrification and respiration rates indicated that these three microbial processes were interacted, which posed impacts on soil nitrogen availability. As indicated by the results, C:N ratio coupled with content could be taken as the indicators of content, which is usually the predominant form of N available to plants growing in soil. Results showed that content was the highest (i.e., >62.4 mg/kg) when C:N ratio was 5.30–8.40, meanwhile content was 3.71–4.39 mg/kg. Nevertheless, content was the lowest (i.e., <6.40 mg/kg) when C:N ratio was 9.2–12.10, meanwhile content was 3.41–4.35 mg/kg.

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mentioning

confidence: 99%

Microbial nitrification, denitrification and respiration in the leached cinnamon soil of the upper basin of Miyun Reservoir

Cai

Zhang

et al. 2017

Sci Rep

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“…Yang et al [33] reported that the TN removal mainly rely on simultaneous nitrification and denitrification (SND) performance in SBR, which on account of DO concentration gradients arising from diffusional limitations. Besides, total nitrogen loss in the supernatant of aerobic zone may be caused by SND and assimilation during the continuous aeration membrane bioreactor processes [25,36,37]. Therefore, it is important to analyze the pollutants removal efficiency of these two reactors based on SND performance.…”

Section: Results Indicated That Change Of C/n Ratio Had No Great Impamentioning

confidence: 99%

“…The concentrations of COD, MLSS, MLVSS, NH 4 + -N, TN were measured according to the standard methods [24]. The sludge volume index (SVI) was calculated as the biomass volume after 30 min of settling [25].…”

Section: Methodsmentioning

confidence: 99%

Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

Cai

Zaidi

Sun

et al. 2019

Period. Polytech. Chem. Eng.

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Design of ship sewage treatment systems that not only satisfy the use of small space on board but also meets International Maritime Organisation (IMO) latest emission standards is still a challenging problem for ship industry. This study provides a comparative disquisition between two different MBR reactors i.e, air-lift multilevel circulation membrane reactor (AMCMBR) and anaerobic/anoxic/aerobic membrane reactor (AOA-MBR) for domestic sewage treatment. The influence of pollutants volume loading rate (VLR) and C/N on effluent chemical oxygen demand (COD), ammonium nitrogen (NH4+-N) and TN for marine domestic sewage was analyzed. The results revealed that AMCMBR showed better removal efficiencies for COD and TN than AOA-MBR. The volume of AMCMBR was only half of the AOA-MBR. In addition, high average value of mixed liquor volatile suspended solids (MLVSS)/mixed liquid suspended solids (MLSS) (i.e. 0.75) of AMCMBR indicated high biomass and good pollutants removal achieved by this reactor. An interesting phenomenon was found in the study regarding Urease activity for the two reactors. Urease activity for AMCMBR in different working conditions all exceeded AOA-MBR and there exist no clear difference of NR activities between AMCMBR and AOA-MBR except for low C/N ratio (i.e. 6 and 4). This phenomenon proved that AMCMBR has a greater performance for treating ship domestic wastewater.

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“…Previous studies [30][31] researched the effect of carbon sources on SND and the results were always the same -that a higher C/N ratio can achieve better SND efficiency. In this study, since the aim was to simulate the actual sewage treatment, the wastewater used in experiments was adjusted to real domestic wastewater, the C/N ratio ranged from 6 to 8 all the time.…”

Section: Tn Removalmentioning

confidence: 87%

Screening an Effective Aerobic Denitrification Strain and its Performance in MBR

Guo¹,

Guo²,

Li³

et al. 2017

Pol. J. Environ. Stud.

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Effect of operational modes on nitrogen removal and nitrous oxide emission in the process of simultaneous nitrification and denitrification

Cited by 69 publications

References 47 publications

Microbial nitrification, denitrification and respiration in the leached cinnamon soil of the upper basin of Miyun Reservoir

Microbial nitrification, denitrification and respiration in the leached cinnamon soil of the upper basin of Miyun Reservoir

Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

Screening an Effective Aerobic Denitrification Strain and its Performance in MBR

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