不同C/N下SBBR脱氮过程N<sub>2</sub>O释放及胞外多聚物变化

巩有奎; 赵强; 彭永臻

doi:10.11949/0438-1157.20190753

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不同C/N下SBBR脱氮过程N₂O释放及胞外多聚物变化

能源和环境工程 | 更新时间：2026-07-24

- 不同C/N下SBBR脱氮过程N₂O释放及胞外多聚物变化
- Variation of N₂O emission and EPS production during simultaneous nitrification and denitrification in SBBR under different C/N ratio
- 化工学报 2019年70卷第12期页码：4847-4855
- 作者机构：
  
  1. 烟台职业学院建筑工程系，山东烟台 264670
  2. 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 100124
- 作者简介：
  
  巩有奎（1977—），男，博士，副教授，260943813@qq.com
- 基金信息：
  
  国家自然科学基金项目(51508008);烟职博士科研项目(2018002)
- DOI：10.11949/0438-1157.20190753
  中图分类号： X 703.1
- 收稿：2019-07-02，
  
  修回：2019-08-28，
  
  网络首发：2020-06-09，
  
  纸质出版：2019-12-05
- 稿件说明：
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巩有奎, 赵强, 彭永臻. 不同C/N下SBBR脱氮过程N₂O释放及胞外多聚物变化[J]. 化工学报, 2019, 70(12): 4847-4855 DOI: 10.11949/0438-1157.20190753.

GONG Youkui, ZHAO Qiang, PENG Yongzhen. Variation of N₂O emission and EPS production during simultaneous nitrification and denitrification in SBBR under different C/N ratio[J]. CIESC Journal, 2019, 70(12): 4847-4855 DOI: 10.11949/0438-1157.20190753.
巩有奎, 赵强, 彭永臻. 不同C/N下SBBR脱氮过程N₂O释放及胞外多聚物变化[J]. 化工学报, 2019, 70(12): 4847-4855 DOI: 10.11949/0438-1157.20190753. DOI：

GONG Youkui, ZHAO Qiang, PENG Yongzhen. Variation of N₂O emission and EPS production during simultaneous nitrification and denitrification in SBBR under different C/N ratio[J]. CIESC Journal, 2019, 70(12): 4847-4855 DOI: 10.11949/0438-1157.20190753. DOI：

摘要

在(20±2.0)℃条件下，利用序批式生物膜反应器（sequencing batch biofilm reactor，SBBR），考察不同碳氮比（C/N=3.0、5.0、8.0和10.0）下同步脱氮（simultaneous nitrification and denitrification，SND）过程N

O释放及胞外聚合物（extracellular polymeric substance，EPS）变化。C/N由3.0增至10.0，异养菌大量增殖，曝气阶段DO降低，系统硝化性能受到抑制，SBBR系统出水NH

由0.5 mg/L以下增至（7.85±1.42）mg/L，N

O产量由（2.68±0.17）mg/L降至（1.02±0.12）mg/L。C/N=8.0，TN去除率最大为80.4%±3.5%。反应初期，微生物体内聚β-羟基烷酸酯（PHA）增加，可为后续反硝化过程提供电子供体。AOB好氧反硝化和低氧条件下异养菌反硝化过程均可导致N

O产生。C/N降低，SBBR内部缺氧区域减少，N

O还原过程减弱，释

放量增加；C/N增加，N

O扩散进入生物膜内缺氧区域，促进其减量。C/N由3.0增至10.0，微生物EPS分泌由（57.6±5.6）mg / g VSS降至（32.7±3.2）mg / g VSS，其中，TB-EPS含量占65.8%~68.8%。低C/N下，紧密型EPS（TB-EPS）中多糖（PS）含量增加，生物膜更加密实，N

O扩散进入缺氧区阻力增加，释放量增加。

Abstract

At normal temperature of (20±2.0)℃

the characteristics of N

O eimssion and extracellular polymeric substance(EPS) production were studied during simultaneous nitrification and denitrification(SND) process under different C/N ratio (C/N=3.0

5.0

8.0 and 10.0). When C/N increased from 3.0 to 10.0

the heterotrophic bacteria increased rapidly

DO decreased and the nitrification process was inhibited. The effluent NH

increased from below 0.5 mg/L to (7.85±1.42) mg/L

and the N

O emission decreased from (2.68±0.17) mg/L to (1.02±0.12) mg/L. When C/N was 8.0

the maximum total notrogen removal efficiency was 80.4%±3.5%. The accumulation of PHA(poly-β-hydroxyalkanoate) increased firstly and then decreased. Both nitrifier denitrification and heterotrophic denitrification resulted in N

O production. The anoxic area located in the biofilm decreased with the decreasing of C/N ratio

which weakened the denitrification process. With the increase of C/N ratio

O diffused into the anoxic region of biofilm can be effectively reduced. The microbial EPS secretion decreased from (57.6±5.6) mg / g VSS to (32.7±3.2) mg / g VSS. The TB-EPS content accounts for 65.8%—68.8% of the total EPS. Under low C/N

the content of polysaccharide (PS) in compact EPS (TB-EPS) increased

the biofilm was more compact

the resistance of N

O diffusion into the anoxic zone increased

and the release increased.

关键词

Keywords

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不同C/N下SBBR脱氮过程N2O释放及胞外多聚物变化

Variation of N2O emission and EPS production during simultaneous nitrification and denitrification in SBBR under different C/N ratio

DOI：10.11949/0438-1157.20190753

摘要

Abstract

关键词

Keywords

references

不同C/N下SBBR脱氮过程N₂O释放及胞外多聚物变化

Variation of N₂O emission and EPS production during simultaneous nitrification and denitrification in SBBR under different C/N ratio