东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (8): 1205-1210.DOI: 10.12068/j.issn.1005-3026.2018.08.028

• 资源与土木工程 • 上一篇    下一篇

C/N对好氧反硝化菌强化的SBR脱氮效率的影响

赵鑫, 刘芳, 赵研, 胡筱敏   

  1. (东北大学 资源与土木工程学院, 辽宁 沈阳110819)
  • 收稿日期:2017-04-05 修回日期:2017-04-05 出版日期:2018-08-15 发布日期:2018-09-12
  • 通讯作者: 赵鑫
  • 作者简介:赵鑫(1982-),男,辽宁沈阳人,东北大学副教授,博士; 胡筱敏(1958-),男,江西婺源人,东北大学教授,博士生导师.冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.
  • 基金资助:
    国家科技重大专项(2013ZX07202-010).国家自然科学基金资助项目(51171041).

Effects of C/N on the Denitrification Efficiency of SBR Enhanced by Aerobic Denitrifying Bacteria

ZHAO Xin, LIU Fang, ZHAO Yan, HU Xiao-min   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2017-04-05 Revised:2017-04-05 Online:2018-08-15 Published:2018-09-12
  • Contact: ZHAO Xin
  • About author:-
  • Supported by:
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摘要: 使用2株具有良好的好氧反硝化能力的假单胞菌对序批式反应器(SBR)进行生物强化,连续运行61 d,探讨进水C/N变化对微生物强化SBR内微生物菌群和其脱氮效率的影响.随着C/N降低,反硝化效率明显降低,但是经强化的SBR的反硝化效率始终优于对照组,向活性污泥中接种好氧反硝化细菌后,NO-3-N 去除率最高提升14.1%,使用纯菌构建人工菌群可将NO-3-N去除率提高22.6%.使用好氧反硝化菌进行强化可以提升反硝化细菌所占比例,促使其迅速成为优势功能菌群,缩短系统的启动周期,大幅提高系统的反硝化效率,并且提高菌群结构和系统运行的稳定性.该技术在处理C/N>10∶1的含硝酸盐的污水时更具优势.

关键词: 生物强化, 好氧反硝化, 序批式反应器, 脱氮效率, 菌群结构分析

Abstract: Two strains of Pseudomonas with efficient aerobic denitrification ability were used in the bio-augmentation process of sequencing batch reactor. In the 61 days’ operating process, the effects of C/N on the microbial community structures and denitrification efficiency were investigated. Although the denitrification efficiencies obviously decreased with the C/N decreasing, the performances of bio-augmentation groups were better than those of the negative control. Adding efficient aerobic denitrifiers into activated sludge enhanced the NO-3-N removal rate by about 14.1%, whereas the pure-cultured group was enhanced by 22.6%. Bio-augmentation with aerobic denitrifiers enhanced the proportion of denitrifiers, promoted them to be the dominant functional population, shortened the system’s start-up period, greatly enhanced the denitrification efficiency, and improved the stability of the microbial community structure and the system’s operation. This technique is more advantageous in the treatment of C/N>10∶1 wastewater containing nitrate.

Key words: bio-augmentation, aerobic denitrification, SBR, denitrification efficiency, microbial community structure analysis

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