期刊
WATER RESEARCH
卷 47, 期 9, 页码 3131-3140出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2013.03.019
关键词
Nitrous oxide; Nitric oxide; Partial nitrification; Ammonia-oxidizing bacteria; Reject wastewater
资金
- Spanish Government
- Ministerio de Economia y Competitividad [CTM 2011-27163]
- European Commission [FP7-PEOPLE-2011-CIG 303946]
- Spanish Government [RYC-2009-04959]
A sequencing batch reactor (SBR) was enriched with ammonia oxidizing bacteria (AOB) in order to treat synthetic reject wastewater (1 g NH4+ - N/L). Partial nitrification was successfully achieved at a NH4+ - N to NO2- - N conversion rate of 98%. The emission dynamics of nitrous oxide (N2O) and nitric oxide (NO) were monitored during normal operation and under 3 different cycle configurations. An N2O peak was detected during the first 5 min of the cycle in all cases which corresponded to 60-80% of the total N2O emitted. When anoxic phases were introduced, N2O emissions were minimized but NO increased. Factors affecting the initial N2O peak were studied in a set of individual experiments. It was concluded that most of this N2O originated during settling due to biological reactions. Complete oxidation of NH4+ (or most likely hydroxylamine) as a result of sufficient aeration time can be a minimization strategy for N2O emissions in partial nitrification systems. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据