摘要
在无O2条件下,氨氧化速率越高,氨氧化过程中产生的NO2--N、NO3--N浓度和氮损失越大;NO2为25×10-6mg/L时氮损失率最大,约为20.93%。在相同浓度的O2条件下,氮损失与氨氧化速率相关,氨氧化速率增加时,氮损失增大。在O2的体积分数为2%时,50×10-6mg/LNO2时的氮损失率最大,为27.57%;在O2的体积分数为21%时,100×10-6mg/LNO2时的氮损失率最大,为34.19%。
Series of lab experiments were performed in small 500 batch reactors （450 mL mixed solution and 50 mL clean nitrifying activated sludge） to determine to effects of NO2 and O2 in the gaseous feed on ammonium oxidation in the activated sludge process. When O2 was absent in the gaseous feed, the production of NO2^--N and NO3^--N and the loss of nitrogen （unaccounted N） increased with the rate of ammonium oxidation; the maximum Nloss, was 20.93 % with 25 × 10^-6 mg/L of NO2 present in the feed. The NO3^--N production increased with the amount of O2 in the feed which also included a trace amount of NO2. The Nloss increased with the rate of ammonium oxidation when the same amount of O2 was present in the feed. The maximum Nloss was 27. 57% when the feed included 50×10^-6mg/L of NOz and 2% O2 ; the maximum Nlos, was 34.19% when the feed included 100×10^-6mg/L of NO2 and 21% O2.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第2期41-44,共4页
Environmental Pollution & Control
基金
重庆大学研究生科技创新基金资助项目(No.200609Y1A0260185)
重庆交通大学引进人才基金项目
关键词
微量NO2
氨氧化
产物
影响
trace NO2
aerobic ammonium oxidation
production
effect
