Startup and stability of A<sub>2</sub>N<sub>2</sub> double sludge system denitrifying phosphorus removal process

WANG Meixiang; ZHAO Weihua; WANG Shuying; ZHANG Yong; PENG Yongzhen; PAN Cong; HUANG Yu

doi:10.11949/j.issn.0438-1157.20160107

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Startup and stability of A₂N₂ double sludge system denitrifying phosphorus removal process

更新时间：2025-11-26

- Startup and stability of A₂N₂ double sludge system denitrifying phosphorus removal process
- CIESC Journal Issue 7, Pages: 2987-2997(2016)
- 作者机构：
  
  北京工业大学北京市水质科学与水环境恢复工程重点实验室, 北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160107
  CLC： 703.1
- Online First：05 July 2016，
  
  Published：05 July 2016
- 稿件说明：
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WANG Meixiang, ZHAO Weihua, WANG Shuying, et al. Startup and stability of A₂N₂ double sludge system denitrifying phosphorus removal process[J]. CIESC Journal, 2016, (7): 2987-2997. DOI: 10.11949/j.issn.0438-1157.20160107.
DOI：

WANG Meixiang, ZHAO Weihua, WANG Shuying, et al. Startup and stability of A₂N₂ double sludge system denitrifying phosphorus removal process[J]. CIESC Journal, 2016, (7): 2987-2997. DOI: 10.11949/j.issn.0438-1157.20160107. DOI：

摘要

采用低C/N比实际生活污水，以A2N2-SBR（厌氧/硝化/缺氧/硝化）双污泥系统为研究对象，重点考察了A2N2系统启动过程中的脱氮除磷特性。试验结果表明：采用在A2/O-SBR和N-SBR单元分别接种种泥，分开培养驯化聚磷菌污泥和硝化菌生物膜，并利用A2/O-SBR单元的出水作为N-SBR单元的进水，25 d好氧硝化菌生物膜挂膜成功，氨氮去除率稳定在93%以上；A2/O-SBR单元采用先厌氧/好氧（A/O）后厌氧/缺氧（A/A）的运行方式，43 d成功培养富集了反硝化聚磷菌（DPAOs），DPAOs占PAOs的67.81%，反硝化除磷率在77.9%以上；启动成功后原水中约73%和13%的COD分别在A2/O-SBR单元的厌氧段和N-SBR单元曝气过程中被去除，系统出水COD、NH+4-N、PO43--P、TN浓度分别为40.6、0、0.4、13.5 mg·L-1，达到国家《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级A排放标准。

Abstract

The A2N2-SBR (anaerobic/nitrification/anoxic/nitrification) double sludge system was investigated by using low C/N domestic sewage. This study focused on the characteristics of nitrifying bacteria biofilm membrane and denitrifying phosphorus accumulating bacteria (DPAOs) domestication and cultivation

A2N2 double sludge denitrifying phosphorus removal process denitrification and phosphorus removal characteristics of the startup process. The results showed that by connecting sludge to A2/O-SBR unit and N-SBR unit

respectively to culture domestication phosphorus accumulating bacteria sludge and nitrifying bacteria biofilms separately. By using the A2/O-SBR unit effluent as the influent of N-SBR nitrifying units

the nitrification biofilm was grown up successfully within 25 d. The ammonia nitrogen removal rate was stable above 93%. In the A2/O-SBR unit

the sludge mixture was operated under anaerobic/aerobic (A/O) condition firstly. Then

the activated sludge was conducted under anaerobic/anoxic (A/A) condition

which reinforced the effect of the inoculating sludge denitrifying phosphorus removal commendably. After 43 d

the denitrifying phosphorus accumulating bacteria (DPAOs) was successfully enriched. DPAOs accounted PAOs for 67.81%. The denitrifying phosphorus removal rate steadily stayed above 77.9%. After startup successfully

about 73%

13% COD of raw water was used by phosphorus accumulating bacteria during the A2/O-SBR unit anaerobic phase and was removed in the N-SBR unit aeration process

respectively. The A2N2 system effluent COD

NH+4-N

PO43--P

TN concentrations was 40.6

0.4 and 13.5 mg·L-1

respectively

meeting national level A emission standards. It was suggested that A2N2 double sludge system denitrifying phosphorus removal process with good denitrification and phosphorus removal performance.

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Related Institution

National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology

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Startup and stability of A2N2 double sludge system denitrifying phosphorus removal process

DOI：10.11949/j.issn.0438-1157.20160107

摘要

Abstract

关键词

Keywords

references

Startup and stability of A₂N₂ double sludge system denitrifying phosphorus removal process