Nitrous oxide emissions from an activated sludge wastewater treatment plant with prolonged aeration process - a preliminary study

Quimica nova

Kligerman, Débora Cynamon¹  Piccoli, Andrezza de Souza¹  Brotto, Ariane Coelho¹  de Mello, William Zamboni² 

[1] Fundação Oswaldo Cruz, Rio de Janeiro, Brasil;Universidade Federal Fluminense, Niterói, Brasil

关键词: nitrous oxide;    wastewater treatment;    activated sludge.;   

DOI  :  10.1590/S0100-40422010000300025

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Nitrous oxide emissionsfrom an activated sludge plant which serves a research institute in Rio de Janeirocity were estimated from six unit processes (grit tank, sand trap, aerationtank, secondary settling tank, sludge recirculation line and aerobic digestersludge tank) and also from the plant effluent. Total estimated annual flux was3.2 x 104 g N2O yr-1 of which about 90% wasfrom the aeration tank. Emission factors estimated from population served, wastewaterflow and nitrogen load (conversion ratio) were 13 g N2O person-1yr-1, 9.0 x 10-5 g N2O Lwastewater-1and 0.14%.

【 授权许可】

CC BY