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

William Z. de Mello, Renato P. Ribeiro, Ariane C. Brotto, Débora C. Kligerman, Andrezza de S. Piccoli, Jaime L. M. Oliveira
2013 Química Nova  
Recebido em 26/1/12; aceito em 13/7/12; publicado na web em 29/11/12 This study investigated the emission of N 2 O 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). N 2 O emission occurred during both stages; however, emission was much higher during aeration. Air stripping is the major factor controlling transfer of N 2 O from the sewage to the atmosphere. The N 2 O emissions
more » ... O 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 N 2 O emission from WWTPs.
doi:10.1590/s0100-40422013000100004 fatcat:2ihziii6hngavezrb2zraokbl4