Nitrous oxide production during nitrogen removal from domestic wastewater in lab-scale sequencing batch reactor

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• 作者：Xiuhong LIU ; Yi PENG ; Changyong WU ; Takigawa AKIO ; Yongzhen PENG
• 关键词：N₂O ; domestic wastewater ; nitrification ; denitrification
• 刊名：Journal of Environmental Sciences
• 出版年：2008
• 出版时间：2008
• 年：2008
• 卷：20
• 期：6
• 页码：641-645
• 全文大小：715 K

文摘

The production of N₂0 during nitrogen removal from real domestic wastewater was investigated in a lab-scale aerobic-anoxic sequencing batch reactor with a working volume of 14 L. The results showed that the total N₂0-N production reached higher than 1.87 mg/L, and up to 4 % of removed nitrogen was converted into N₂0. In addition, N₂0 led to a much higher greenhouse effect than C0₂ during aerobic reaction phase, this proved that N₂0 production could not be neglected. The N₂ON production during nitrification was 1.85 mg/L, whereas, during denitrification, no N₂0 was produced, nitrification was the main source of N₂0 production during nitrogen removal. Furthermore, during denitrification, the dissolved N₂0 at the end of aeration was found to be further reduced to N₂. Denitrification thus had the potential of controlling N₂0 production.