Effect of C/N ratio on nitrous oxide emission from swine wastewater treatment process

Kishida, Naohiro; Kim, J. H.; Kimochi, Yuzuru; Nishimura, Osamu; Sasaki, Hiroshi; Sudo, Ryuichi

doi:10.2166/wst.2004.0775

Cited by 71 publications

(39 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar observations have also been reported by Kishida et al [85]. A pure culture study with A. faecalis shows that when carbon sources are limiting, N 2 O formation increases by 32-64%, while N 2 production decreases significantly [84].…”

Section: Key Process Conditions Leading To Nitrous Oxide Emissionssupporting

confidence: 89%

“…On the contrary, it is reported in full-scale studies that only little N 2 O generation and emission is observed regardless of carbon deficiency or sufficiency in anoxic zones or aerobic zones [14]. The nitrogen or helium sparging used to induce anoxia in the laboratory scale studies [84,85] may have contributed to the discrepancy between the observation in laboratory scale and full-scale studies. The continuous sparging may have stripped off the dissolved N 2 O to render it unavailable for further reduction to N 2 .…”

Section: Key Process Conditions Leading To Nitrous Oxide Emissionsmentioning

confidence: 92%

See 1 more Smart Citation

Nitrous oxide emissions from wastewater treatment processes

Law

Pan

et al. 2012

Phil. Trans. R. Soc. B

411

283

View full text Add to dashboard Cite

Nitrous oxide (N 2 O) emissions from wastewater treatment plants vary substantially between plants, ranging from negligible to substantial (a few per cent of the total nitrogen load), probably because of different designs and operational conditions. In general, plants that achieve high levels of nitrogen removal emit less N 2 O, indicating that no compromise is required between high water quality and lower N 2 O emissions. N 2 O emissions primarily occur in aerated zones/compartments/periods owing to active stripping, and ammonia-oxidizing bacteria, rather than heterotrophic denitrifiers, are the main contributors. However, the detailed mechanisms remain to be fully elucidated, despite strong evidence suggesting that both nitrifier denitrification and the chemical breakdown of intermediates of hydroxylamine oxidation are probably involved. With increased understanding of the fundamental reactions responsible for N 2 O production in wastewater treatment systems and the conditions that stimulate their occurrence, reduction of N 2 O emissions from wastewater treatment systems through improved plant design and operation will be achieved in the near future.

show abstract

Section: Key Process Conditions Leading To Nitrous Oxide Emissionssupporting

confidence: 89%

Section: Key Process Conditions Leading To Nitrous Oxide Emissionsmentioning

confidence: 92%

Nitrous oxide emissions from wastewater treatment processes

Law

Pan

et al. 2012

Phil. Trans. R. Soc. B

411

283

View full text Add to dashboard Cite

show abstract

“…While the N2O emission factor changed a little, it decreased with increasing C/N ratios, which had also been observed in some previous studies with nitrate as the electron acceptor [35]. Alinsafi et al [36] obtained that during denitrification with NO3-N as the electron acceptor, a low C/N ratio caused NO2-N accumulation, inhibited N2O reductase and induced N2O emissions.…”

Section: Effect Of C/n Ratios On N2o Emissions During Denitrificationsupporting

confidence: 73%

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

“…At the same storage temperature, ventilation rate, and storage depth, the much lower COD/N ratio of 1.6:1 in BDE might be the primary reason for the higher N 2 O emissions, as compared with RLM, which had a much higher COD/N ratio of 6.8:1. The results of this experiment were consistent with the observations of Wu et al (2009) and Kishida et al (2004), who reported that N 2 O emissions depended fundamentally on the influent COD/N ratio. Wu et al (2009) compared the effects of five COD/N ratios (0:1, 2:1, 5:1, 10:1, and 20:1) on N 2 O emissions from microcosm wetlands.…”

Section: Ch 4 and Co 2 Emissions From Rlm And Bdesupporting

confidence: 91%

Comparison of Air Emissions from Raw Liquid Pig Manure and Biogas Digester Effluent Storages

2014

Trans.ASABE

View full text Add to dashboard Cite

Biogas digesters are commonly used in livestock farming in China. The digestion process converts large amounts of raw liquid manure (RLM) to biogas digester effluent (BDE). The BDE is then stored on the farm for some time before land application as crop or orchard nutrients. Storage of RLM or BDE is associated with gas emissions, although little information is available concerning comparison of air emissions between the two handling practices. This study was conducted to compare methane (CH 4 ), carbon dioxide (CO 2 ), nitrous oxide (N 2 O), and ammonia (NH 3 ) emissions from RLM and BDE storages using dynamic emission vessels (DEVs). Both media were stored in closed vessels (50 L) at a 40Â cm storage depth, a constant storage temperature of 30Â°C, and a headspace air exchange rate of 15 to 17 air changes per hour (ACH) for 22 days. The results showed that the average daily gas emission rates for RLM and BDE, in mg L -1 d -1 , were, respectively, 102.9 and 125.3 CO 2 (p < 0.05), 0.72 and 3.33 N 2 O (p < 0.05), 29.2 and 0.32 CH 4 (p < 0.05), and 1.21 and 0.66 NH 3 (p = 0.08). The total greenhouse gas (GHG = CH 4 + CO 2 + N 2 O) emissions were similar for RLM and BDE, 1.05 and 1.12 g CO 2 -eq L -1 d -1 , respectively (p = 0.26). Nitrous oxide (N 2 O) emissions accounted for 88.2% of the CO 2 -eq GHG emissions for BDE, whereas CH 4 emissions accounted for 69.7% of the CO 2 -eq GHG emissions for RLM. The high N 2 O emissions from BDE likely resulted from the lower COD/N ratio in BDE than RLM under the storage conditions. Differences in gaseous emission characteristics between RLM and BDE were attributed to the differences in methanogen species and the population of ammonia-oxidizing bacteria (AOB). were, respectively, 102.9 and 125.3 CO 2 (p < 0.05), 0.72 and 3.33 N 2 O (p < 0.05), 29.2 and 0.32 CH 4 (p < 0.05), and 1.21 and 0.66 NH 3 (p = 0.08

show abstract

Effect of C/N ratio on nitrous oxide emission from swine wastewater treatment process

Cited by 71 publications

References 0 publications

Nitrous oxide emissions from wastewater treatment processes

Nitrous oxide emissions from wastewater treatment processes

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

Comparison of Air Emissions from Raw Liquid Pig Manure and Biogas Digester Effluent Storages

Contact Info

Product

Resources

About