NDLI: Nitrogen removal in a wastewater treatment plant through biofilters: nitrous oxide emissions during nitrification and denitrification

Content Provider	Springer Nature Link
Author	Tallec, Gaëlle Garnier, Josette Gousailles, Michel
Copyright Year	2006
Abstract	In order to estimate N2O emissions from immersed biofilters during nitrogen removal in tertiary treatments at urban wastewater treatment plants (WWTPs), a fixed culture from the WWTP of “Seine Centre” (Paris conurbation) was subjected to lab-scale batch experiments under various conditions of oxygenation and a gradient of methanol addition. The results show that during nitrification, N2O emissions are positively related to oxygenation (R 2 = 0.99). However, compared to the rates of ammonium oxidation, the percentage of emitted N2O is greater when oxygenation is low (0.5–1 mgO2 L−1), representing up to 1% of the oxidized ammonium (0.4% on average). During denitrification, the N2O emission reaches a significant peak when the quantity of methanol allows denitrification of between 66% and 88%. When methanol concentrations lead to a denitrification of close to 100%, the flows of N2O are much lower and represent on average 0.2% of the reduced nitrate. By considering these results, we can estimate, the emissions of N2O during nitrogen removal, at the “Seine Centre” WWTP, to approximately 38 kgN-N2O day−1.
Starting Page	323
Ending Page	333
Page Count	11
File Format	PDF
ISSN	16157591
Journal	Bioprocess Engineering
Volume Number	29
Issue Number	5-6
e-ISSN	16157605
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-09-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	N2O Wastewater treatment plant Biofilters Nitrification Denitrification Food Science Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Waste Management/Waste Technology Industrial and Production Engineering Industrial Chemistry/Chemical Engineering Biotechnology
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Biotechnology

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