Impact of ammonium and salinity concentrations on Nitrous Oxide emission in partial nitrification system

Kong, Qiang

doi:10.1007/s12205-014-0035-z

Cited by 12 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the Root Zone Theory, ROL provides continuous aerobic, anoxic, and anaerobic conditions in soil, allowing simultaneous nitrification and denitrification [62]. The nitrifying bacteria and ammonia-oxidizing bacteria can use oxygen produced by ROL to transform ammonia into nitrate and nitrite, whereas denitrifying bacteria transform nitrate into nitrogen in the anoxic zone far from the roots [63,64]. In addition, ROL exerts a positive effect on the removal of nitrification-inhibiting substances, such as organic matter and heavy metals.…”

Section: Effects On Nitrogen Removalmentioning

confidence: 99%

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Wang

Xie

et al. 2018

Water

View full text Add to dashboard Cite

Constructed wetlands (CWs) are extensively used as an economical and environmentally friendly sewage treatment under ecological engineering technology. Knowledge of the oxygen in the rhizosphere is of primary importance in understanding the function and regulation of microbial communities and macrophytes. Numerous studies on radial oxygen loss (ROL) have greatly elucidated the mechanism of contaminant removal in CWs. The main sources of oxygen in CWs are atmospheric reoxygenation, macrophyte transmission, and artificial aeration. However, artificial aeration is very expensive, and atmospheric reoxygenation is limited. Therefore, ROL by macrophytes is an essential and economical approach for oxygen input in CWs. In this review, we attempted to study the role of macrophytes in CWs. We described the mechanism of ROL and summarized the methods for determining ROL. We also investigated the role of ROL in contaminant removal in CWs. This review will provide considerable useful information on the oxygen input of CWs.

show abstract

Section: Effects On Nitrogen Removalmentioning

confidence: 99%

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Wang

Xie

et al. 2018

Water

View full text Add to dashboard Cite

show abstract

“…Compared with the situation at 100 mg L −1 , the N 2 O releasing factor increased by 0.13‰ at 200 mg L −1 and 0.33‰ at 500 mg L −1 , probably because of the alkaline environment and nitrite accumulation caused by high NH 4 + –N concentrations . However, the emissions of N 2 O under high‐strength ammonium conditions were much lower than those under conditions in the partial nitrification system and autotrophic nitrification system . Accordingly, strain YH could strongly reduce exogenous N 2 O emission.…”

Section: Resultsmentioning

confidence: 88%

Kinetic characteristics and N₂O production of a heterotrophic nitrifying bacterium Pseudomonas putida YH capable of tolerating adverse environmental conditions

Liu

Wang

Xiao

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Heterotrophic nitrifying bacteria (HNB) have rapid growth rate, high activity and strong anti‐shock ability. These attributes are advantageous in engineering applications, yet the use of HNB is restricted by lack of clarity about the kinetics and metabolic mechanisms involved. Thus, nitrogen conversion characteristics, kinetics and N2O production of the HNB Pseudomonas putida YH were evaluated. RESULTS Strain YH exhibited superior heterotrophic nitrification‐aerobic denitrification (HNAD) ability in treating nitrogenous wastewater, with maximum removal rates of 10.07, 8.86 and 8.78 mg L−1 h−1 for NH4+–N, NO3−–N and NO2−–N, respectively. Mass balance analysis demonstrated that the removed TN was mainly due to bacterial assimilation (53–55%) and conversion into gaseous N2 (34–39%), instead of nitrification intermediate accumulation and N2O emission. In addition, the kinetics of nitrogen degradation and cellular growth of strain YH exactly conformed to the modified Gompertz equation and the Logistic equation, respectively. Moreover, strain YH showed excellent adaptability to variations of temperature, pH, C:N ratio and initial NH4+–N concentration in terms of nitrogen removal and N2O emission. The highest NH4+–N removal rate was obtained at pH 7.0, temperature 30 °C and C:N ratio of 15. Furthermore, the heterotrophic nitrification ability was just partially deteriorated after the addition of inhibitors, which further proved the multiple metabolic pathways of heterotrophic nitrification by strain YH. CONCLUSION The results demonstrated that strain YH exhibited excellent abilities of HNAD, N2O emission control and tolerance to adverse conditions, indicating that strain YH can be an effective candidate for treating nitrogenous wastewater without secondary pollution. © 2019 Society of Chemical Industry

show abstract

“…SBBR provides higher nitrogen removal efficiency through shortcut biological nitrogen removal (SBNR). Many researchers studied nitrogen removal by SBR and SBBR [8,9] but a few of them surveyed the comparison between nitrogen removal from ammoniumrich wastewaters by SBR and SBBR [10]. Some of researchers studied nitrogen removal from wastewater with low COD or low carbon to nitrogen (C/N) ratio [3,11].…”

Section: Nitrogen Removal From Ammonium-rich Pharmaceutical Wastewatementioning

confidence: 99%

Nitrogen removal from ammonium-rich pharmaceutical wastewater: a comparison between sequencing batch reactor (SBR) and sequencing batch biofilm reactor (SBBR)

Hajsardar¹,

Borghei²,

Hassani³

et al. 2018

Environ. Protect. Eng.

View full text Add to dashboard Cite

Impact of ammonium and salinity concentrations on Nitrous Oxide emission in partial nitrification system

Cited by 12 publications

References 27 publications

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Kinetic characteristics and N₂O production of a heterotrophic nitrifying bacterium Pseudomonas putida YH capable of tolerating adverse environmental conditions

Nitrogen removal from ammonium-rich pharmaceutical wastewater: a comparison between sequencing batch reactor (SBR) and sequencing batch biofilm reactor (SBBR)

Contact Info

Product

Resources

About

Impact of ammonium and salinity concentrations on Nitrous Oxide emission in partial nitrification system

Cited by 12 publications

References 27 publications

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Kinetic characteristics and N2O production of a heterotrophic nitrifying bacterium Pseudomonas putida YH capable of tolerating adverse environmental conditions

Nitrogen removal from ammonium-rich pharmaceutical wastewater: a comparison between sequencing batch reactor (SBR) and sequencing batch biofilm reactor (SBBR)

Contact Info

Product

Resources

About

Kinetic characteristics and N₂O production of a heterotrophic nitrifying bacterium Pseudomonas putida YH capable of tolerating adverse environmental conditions