Effect of C/N on performance of AAO-BAF process

ZHANG Weitang; XUE Xiaofei; PANG Hongtao; ZHANG Jie; LI Dong; PENG Yongzhen

doi:10.11949/j.issn.0438-1157.20141719

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Effect of C/N on performance of AAO-BAF process

更新时间：2025-12-10

- Effect of C/N on performance of AAO-BAF process
- CIESC Journal Issue 5, Pages: 1925-1930(2015)
- 作者机构：
  
  1. 北京工业大学北京市水质科学与水环境恢复重点试验室,北京,100124
  2. 北控水务(中国)投资有限公司,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141719
  CLC： 703.1
- Online First：05 May 2015，
  
  Published：05 May 2015
- 稿件说明：
移动端阅览
ZHANG Weitang, XUE Xiaofei, PANG Hongtao, et al. Effect of C/N on performance of AAO-BAF process[J]. CIESC Journal, 2015, (5): 1925-1930.
DOI：

ZHANG Weitang, XUE Xiaofei, PANG Hongtao, et al. Effect of C/N on performance of AAO-BAF process[J]. CIESC Journal, 2015, (5): 1925-1930. DOI： 10.11949/j.issn.0438-1157.20141719.

摘要

AAO-BAF工艺由厌氧-缺氧-好氧反应器和曝气生物滤池组成

属于外硝化反硝化除磷工艺。以实际生活污水为处理对象

通过调节进水COD浓度(从211 mg·L-1增加到675 mg·L-1)

研究了进水COD和TN的比(C/N)对AAO-BAF工艺运行性能的影响。结果表明

进水有机物浓度低或高

可以通过限制厌氧释磷量或竞争AAO反应器缺氧区的NO3-

从而影响工艺的反硝化除磷效果。当进水C/N大于4

小于7时

AAO-BAF工艺对COD、TN和PO43-的去除率分别可达86%、78%和90%以上。很高的C/N(如9.5)会使缺氧区内存在大量挥发性脂肪酸(VFA)

导致普通反硝化菌迅速消耗反硝化聚磷菌(DPAOs)的电子受体NO3-。

Abstract

Combining anaerobic-anoxic-oxic reactor with an external nitrification biological aerated filter

the AAO-BAF process was used to treat domestic wastewater. Adjusting the influent COD concentration from 211 to 675 mg·L-1

the effect of carbon-nitrogen ratio (C/N) on the performance of the AAO-BAF process was investigated. A low or high influent organic concentration had significant effect on the nutrients removal efficiency due to the deficient phosphorus release or nitrate competition in the anoxic zones of the AAO reactor between DPAOs and ordinary heterotrophic organisms. When C/N was between 4 and 7

the average removal efficiencies of COD

TN and PO43- could reach more than 86%

78% and 90% respectively. Large quantity of residual volatile fatty acid (VFA)would be transferred into the anoxic zones when C/N was very high (such as 9.5)

which would cause rapid consumption of NO3- by ordinary heterotrophic organisms rather than denitrifying phosphorus accumulating organisms (DPAOs).

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