Formation of N<sub>2</sub>O in various biological nitrogen removal processes for treatment of domestic sewage

GONG Youkui; WANG Sai; PENG Yongzhen; WANG Shuying

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Formation of N₂O in various biological nitrogen removal processes for treatment of domestic sewage

更新时间：2025-12-10

- Formation of N₂O in various biological nitrogen removal processes for treatment of domestic sewage
- CIESC Journal Issue 5, Pages: 1286-1292(2010)
- 作者机构：
  
  北京工业大学环境与能源工程学院
- 作者简介：
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- Online First：05 May 2010，
  
  Published：05 May 2010
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GONG Youkui, WANG Sai, PENG Yongzhen, et al. Formation of N₂O in various biological nitrogen removal processes for treatment of domestic sewage[J]. CIESC Journal, 2010, (5): 1286-1292.
DOI：

GONG Youkui, WANG Sai, PENG Yongzhen, et al. Formation of N₂O in various biological nitrogen removal processes for treatment of domestic sewage[J]. CIESC Journal, 2010, (5): 1286-1292. DOI：

摘要

利用好氧-缺氧SBR反应器和全程曝气SBBR反应器处理生活污水，分别实现了全程、短程和同步硝化反硝化脱氮过程，研究了不同脱氮过程中N2O的产生及释放情况，同时考察了不同DO条件下同步脱氮效率及N2O产生量。结果表明，全程、短程生物脱氮过程中N2O主要产生于硝化过程，反硝化过程有利于降低系统N2O产量。全程、短程、同步硝化反硝化脱氮过程中N2O产量分别为4.67、6.48和0.35 mg·L-1。硝化过程中NO2--N的积累是导致系统N2O产生的主要原因。部分AOB在限氧条件下以NH4+-N 作为电子供体，NO2--N作为电子受体进行反硝化，最终产物是N2O。不同DO条件下同步硝化反硝化过程中N2O的产生表明：控制SBBR系统中DO浓度达到稳定的同步脱氮效率可使系统N2O产量最低。

Abstract

The formation and emission of N2O in various nitrogen removal processes for treatment of domestic sewage were investigated using oxic-anoxic SBR systems and a continuum aerobic submerged biofilm reactor system SBBR

from which complete

shortcut and simultaneous nitrification and denitrification(SND) processes were realized

respectively.Meanwhile

the effect of DO on the SND efficiency and N2O yield in SBBR was also studied.The results showed that for both complete and shortcut N removal processes the formation of N2O was in nitrification process

while denitrification one was favorable for decrease of N2O emission.N2O yield was 4.67 mg·L-1，6.48 mg·L-1 and 0.35 mg·L-1 for complete

shortcut and simultaneous nitrification-denitrification processes

respectively.The main reason for the formation of N2O was the accumulation of NO2--N during N removal process.A part of AOB could be denitrified between NH4+-N as electron donor and NO2--N as electron acceptor under low DO level

which led to the formation of N2O finally.The formation of N2O in simultaneous nitrification and denitrification process at various DO conditions showed that in SBBR system

the minimun N2O yield could be achieved by the control of DO concentration and the efficiency balance of nitrogen removal in both nitrification and denitrification processes.

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北京工业大学环能学院北京市水质科学与水环境恢复工程重点实验室

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Formation of N2O in various biological nitrogen removal processes for treatment of domestic sewage

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Formation of N₂O in various biological nitrogen removal processes for treatment of domestic sewage