Nitrous oxide emissions from an intermittent aeration activated sludge system of an urban wastewater treatment plant

Química Nova

William Z. De Mello²  Renato P. Ribeiro²  Ariane C. Brotto²  Débora C. Kligerman¹  Andrezza De S. Piccoli¹  Jaime L. M. Oliveira¹ 

[1],Universidade Federal Fluminense Instituto de Química Departamento de GeoquímicaNiterói RJ ,Brasil

关键词: nitrous oxide;    wastewater treatment;    intermittent aeration;   

DOI  :  10.1590/S0100-40422013000100004

来源: SciELO

【 摘 要 】

This study investigated the emission of N2O during the sequential aerated (60-min) and non-aerated (30-min) stages of an intermittent aeration cycle in an activated sludge wastewater treatment plant (WWTP). N2O emission occurred during both stages; however, emission was much higher during aeration. Air stripping is the major factor controlling transfer of N2O from the sewage to the atmosphere. The N2O emissions exclusively from the aeration tank represented 0.10% of the influent total nitrogen load and the per capita emission factor was almost 3 times higher than that suggested by the IPCC for inventories of N2O emission from WWTPs.

【 授权许可】

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