Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA

MA Bin; WEI Yan; WANG Shuying; CHEN Ya; PENG Yongzhen

doi:10.11949/j.issn.0438-1157.20151089

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Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA

更新时间：2025-12-10

- Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA
- CIESC Journal Issue 12, Pages: 5054-5059(2015)
- 作者机构：
  
  北京工业大学北京市污水脱氮除磷处理与过程控制工程技术研究中心, 北京市水质科学与水环境恢复工程重点实验室,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151089
  CLC： 703
- Online First：05 December 2015，
  
  Published：05 December 2015
- 稿件说明：
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MA Bin, WEI Yan, WANG Shuying, et al. Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA[J]. CIESC Journal, 2015, (12): 5054-5059.
DOI：

MA Bin, WEI Yan, WANG Shuying, et al. Achieving partial nitritation in sewage treatment system based on treating activated sludge by FNA[J]. CIESC Journal, 2015, (12): 5054-5059. DOI： 10.11949/j.issn.0438-1157.20151089.

摘要

为实现城市污水短程硝化厌氧氨氧化生物脱氮

以去除有机物的实际污水为研究对象

考察了游离亚硝酸盐(FNA)处理污泥实现城市污水部分短程硝化的可行性。结果表明

FNA处理活性污泥后

亚硝酸盐氧化菌(NOB)的亚硝酸盐氧化速率下降程度大于氨氧化菌(AOB)的氨氧化速率

且在0～0.75 mg HNO2-N·L-1范围内随着FNA浓度的增加抑制作用增强。接种实际污水厂活性污泥后

系统亚硝酸盐(NO2--N)积累率仅为1%

即为全程硝化。在控制污泥龄约为15 d的条件下

采用FNA处理污泥可使系统亚硝酸盐积累率增加至90%以上。水力停留时间调至2.5 h时

实现了部分短程硝化

且出水NO2--N/NH4+-N平均值为1.24

可满足厌氧氨氧化脱氮反应的要求。因此采用FNA处理污泥

结合水力停留时间和污泥龄控制可实现城市污水部分短程硝化。

Abstract

In order to achieve nitritation/anammox in sewage treatment

the feasibility of achieving partial nitritation using free nitrous acid (FNA) to treat activated sludge was studied in a system treating real wastewater. The results showed that the FNA inhibition on NOB was stronger than that on AOB since the decrease of nitrite oxidation rate was more than that of ammonium oxidation rate

after treating activated sludge by FNA. At the same time

FNA inhibition incresed with increasing FNA concentration at 0-0.75 mg HNO2-N·L-1. The nitrite accumulation rate (NAR) was only 1% after seeding activated sludge obtained from a wastwater treatment plant

indicating that nitrification was happened. When FNA treatment was used with a sludge retention time (SRT) of 15 days

nitritation was achieved since NAR increased to above 90%. The partial nitritation was achieved

and the ratio of of NO2--N/NH4+-N effluent was 1.24 on average when hydraulic retention time (HRT) decreased to 2.5 h. This effluent could meet the requirement of anammox reaction. Thus

partial nitritation could be achieved in sewage treatment system using the activated sludge treated by FNA when SRT and HRT were controlled.

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