Effect of additional carbon sources on nitrogen and phosphorus removal characteristics in A<sup>2</sup>/O-BCO process

SUN Yawen; ZHANG Jianhua; PENG Yongzhen; WANG Shuying

doi:10.11949/j.issn.0438-1157.20180139

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Effect of additional carbon sources on nitrogen and phosphorus removal characteristics in A²/O-BCO process

更新时间：2025-12-10

- Effect of additional carbon sources on nitrogen and phosphorus removal characteristics in A²/O-BCO process
- CIESC Journal Issue 8, Pages: 3626-3634(2018)
- 作者机构：
  
  北京工业大学城镇污水深度处理与资源化利用技术国家工程实验室, 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.0438-1157.20180139
  CLC： 703
- Online First：05 August 2018，
  
  Published：05 August 2018
- 稿件说明：
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SUN Yawen, ZHANG Jianhua, PENG Yongzhen, et al. Effect of additional carbon sources on nitrogen and phosphorus removal characteristics in A²/O-BCO process[J]. CIESC Journal, 2018, (8): 3626-3634. DOI: 10.11949/j.issn.0438-1157.20180139.
DOI：

SUN Yawen, ZHANG Jianhua, PENG Yongzhen, et al. Effect of additional carbon sources on nitrogen and phosphorus removal characteristics in A²/O-BCO process[J]. CIESC Journal, 2018, (8): 3626-3634. DOI: 10.11949/j.issn.0438-1157.20180139. DOI：

摘要

反硝化除磷系统可实现氮、磷的同步去除，但在处理实际低C/N污水时，常需补充碳源以解决碳源不足的问题。采用A2/O-BCO（anaerobic anoxic oxic-biological contact oxidation）反硝化除磷系统，通过投加两种常用的外碳源控制进水C/N在4.3左右，考察碳源类型（丙酸钠、乙酸钠）对A2/O-BCO系统长期运行效果的影响，并采用批次试验进一步探究不同外加碳源条件下活性污泥的内碳源贮存和利用特性。结果表明：碳源种类的变化会改变微生物的底物贮存和利用特性，进而影响系统的脱氮除磷效果。当采用丙酸钠为外加碳源时，PO43--P去除效果稳定在94%左右，实现了磷的高效去除，但TIN的去除率仅为70.82%；而以乙酸钠为外加碳源时，系统TIN的平均去除率可以达到74%，但磷的出水浓度出现波动现象，平均去除率仅为89.90%。碳源转化分析表明，厌氧条件下，进水丙酸钠含量增多，PHV的合成比例增加，相反，乙酸钠含量增多，PHB合成比例增多；缺氧条件下，DPAOs对PHB和PHV的降解效果与其含量相关，丙酸钠作为外碳源时，PHV的降解速率高且微生物产能效率高，因此PO43--P吸收速率较快。此外，本文提出了不同外加碳源条件下系统的优化运行策略。

Abstract

Simultaneous nitrogen and phosphorus removal could be realized by denitrifying phosphorus removal system. However

a shortage of organic carbon for wastewaters with low COD/N ratio can result in adding carbon source to overcome the limitation of low organic carbon. By adding carbon sources to adjust influent COD/N ratio around 4.3

the role of various carbon source in the A2/O-BCO(anaerobic anoxic oxic-biological contact oxidation)process was investigated. The batch tests were used to further research the substrate storage and conversion of activated sludge with various additional carbon sources. These results showed that the substrate storage and utilization characteristics were influenced by the type of influent carbon

which further effected the nitrogen and phosphorus removals. When sodium propionate was the additional carbon source

PO43--P removal steadily maintained around 94%

however

the removal efficiency of TIN was 70.82%. For sodium acetate

TIN removal reached to 74%

but the average removal efficiency of PO43--P was 89.90%. The conversion analysis of carbon source revealed that the content of PHA was mainly PHV with adding sodium propionate in the anaerobic phase. On the contrary

the proportion of PHB increased with adding sodium acetate. In the anoxic phase

the effect of PHB and PHV degradation by DPAOs was closely related to its content. Compared to PHB

PHV is liable to be absorbed by DPAOs. When sodium propionate was used as additional carbon source

the higher PHV degradation rate and productivity efficiency were observed

which improved the phosphorus absorption rate. In addition

the optimal operation strategy of the A2/O-BCO process with various sources was proposed.

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Related Institution

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Effect of additional carbon sources on nitrogen and phosphorus removal characteristics in A2/O-BCO process

DOI：10.11949/j.issn.0438-1157.20180139

摘要

Abstract

关键词

Keywords

references

Effect of additional carbon sources on nitrogen and phosphorus removal characteristics in A²/O-BCO process