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

Química Nova

de Mello, William Zamboni¹  Universidade Federal Fluminense, Niterói, Brasil¹  Fundação Oswaldo Cruz, Rio de Janeiro, Brasil¹  Kligerman, Débora Cynamon¹  Piccoli, Andrezza de Souza¹  Brotto, Ariane Coelho¹ 

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 emissions from an activated sludge plant which serves a research institute in Rio de Janeiro city were estimated from six unit processes (grit tank, sand trap, aeration tank, secondary settling tank, sludge recirculation line and aerobic digester sludge tank) and also from the plant effluent. Total estimated annual flux was 3.2 x 104 g N2O yr-1 of which about 90% was from the aeration tank. Emission factors estimated from population served, wastewater flow and nitrogen load (conversion ratio) were 13 g N2O person-1 yr-1, 9.0 x 10-5 g N2O Lwastewater-1 and 0.14%.

【 授权许可】

Unknown