Impact of ammonium and salinity concentrations on Nitrous Oxide emission in partial nitrification system

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• 作者：Qiang Kong
• 关键词：nitrous oxide (N2O) ; partial nitrification ; ammonium ; salinity
• 刊名：KSCE Journal of Civil Engineering
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：19
• 期：4
• 页码：873-879
• 全文大小：341 KB
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• 作者单位：Qiang Kong (1)
  
  1. College of Life Science, Shandong Normal University, Jinan, Shandong, 250014, PR China
  
• 刊物类别：Engineering
• 刊物主题：Civil Engineering
  Industrial Pollution Prevention
  Automotive and Aerospace Engineering and Traffic
  Geotechnical Engineering
  
• 出版者：Korean Society of Civil Engineers
• ISSN：1976-3808

文摘

This study attempted to elucidate the effects of ammonium and salinity concentrations on Nitrous Oxide (N₂O) emission in a partial nitrification system producing an influent suitable for the anammox process. 1.2%, 1.3% and 1.0% of the incoming nitrogen load was emitted as N₂O-N during the batch partial nitrification with 200, 300 and 400 mg L? NH₄ +-N, respectively. N₂O emission increased with the increase of ammonium concentration and the load in the wastewater due to the high values of the nitrite and ammonium. 1.5%, 1.6%, 1.8% and 1.9% of the incoming nitrogen load was emitted as N₂O-N during the batch partial nitrification with 2, 4, 6 and 8 wt% NaCl, respectively. N₂O emission increased with the increase of salinity concentration in the wastewater as the result of inhibition of nitrous oxide reductase activity. The dynamic behavior of N₂O emission (quantity (y) varying with time (x)) in the partial nitrification process can be fit to the line where y = ax + b under different ammonium and salinity concentrations.