Nitrous oxide production from sequencing batch reactor sludge under nitrifying conditions : effect of nitrite concentrations

Nitrous oxide (N2O), a greenhouse gas which contributes to the destruction of the stratospheric ozone layer, can be emitted from nitrifying processes during wastewater treatment. The pathway of N2O production was studied using a lab-scale nitrifying reactor. Allylthiourea was used to inhibit NH4+ ox...

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Veröffentlicht in:Environmental technology. - 1993. - 33(2012), 4-6 vom: 16. Feb., Seite 401-8
1. Verfasser: Gong, Youkui (VerfasserIn)
Weitere Verfasser: Wang, Shuying, Wang, Sai, Peng, Yongzhen
Format: Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Nitrites Sewage Nitrous Oxide K50XQU1029
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520 |a Nitrous oxide (N2O), a greenhouse gas which contributes to the destruction of the stratospheric ozone layer, can be emitted from nitrifying processes during wastewater treatment. The pathway of N2O production was studied using a lab-scale nitrifying reactor. Allylthiourea was used to inhibit NH4+ oxidation and provide information on processes that happen under nitrifying condition. Our study confirmed that besides heterotrophic bacteria, ammonium-oxidizing bacteria could perform denitrification processes, during which NO2- was the electron acceptor and NH4+ was the electron donor, with N2 and N2O as final products. The relative contribution of the heterotrophic denitrification process to total N2O emissions varied from 46.1% to 60.4% depending on NO2(-)-N addition. Correspondingly, 21.8% to 51.5% of total N2O emissions can be attributed to nitrifier denitrification. Little N2O is emitted during the NO2- oxidation process 
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700 1 |a Peng, Yongzhen  |e verfasserin  |4 aut 
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