Effects of Different Concentrations of Ammonia Nitrogen on N₂O Emission in the Process of Partial Nitrification

• 作者: KONG Qiang MIAO Ming-sheng TIAN Lin ZHANG Jian
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: AMMONIA nitrogen Partial NITRIFICATION SBBR N2O China
• 年，卷（期）: 2012,（12）
• 页码范围: 68-70
• 页数: 3页
• 分类号: X703

摘要

[Objective] The study aimed to discuss the effects of different concentrations of ammonia nitrogen on N2O emission in the process of partial nitrification. [Method] By using a sequencing batch biofilm reactor (SBBR) under intermittent aeration, the influences of various concentrations of influent ammonia nitrogen on nitrous oxide (N2O) emission from partial nitrification were analyzed. [Result] When the concentration of influent ammonia nitrogen varied from 200 to 400 mg/L, the changing trends of DO and ORP value were consistent during the process of partial nitrification, and the concentration ratio of NO-2-N to NH+4-N in effluent water reached 1∶1, with lower NO-3-N level. In addition, ammonia nitrogen concentration in the influent had significant effects on N2O emission in the process of partial nitrification, that is, the higher the ammonia nitrogen concentration, the more the N2O emission. When ammonia nitrogen concentration was 400 mg/L, N2O emission was up to about 37 mg. [Conclusion] N2O emission in the process of partial nitrification might be related to the concentrations of NH+4 and NO-2.