异化硝酸盐还原为铵:废水处理中氮素转化的重要一环
CSTR:
作者单位:

南开大学

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Dissimilatory nitrate reduction to ammonium: an important part of nitrogen transformation in wastewater treatment
Author:
Affiliation:

College of Environmental Science and Engineering,Nankai University

Fund Project:

Anaerobic Wastewater Treatment and Resource Recovery

  • 摘要
  • | |
  • 访问统计
  • |
  • 参考文献
  • | | | |
  • 文章评论
    摘要:

    废水处理过程中涉及多种氮转化途径,其中异化硝酸盐还原为铵(Dissimilatory Nitrate Reduction to Ammonium, DNRA)能够将NO3-/NO2-转化为NH4+,是氮素转化的重要一环。本文概述了DNRA过程的两步反应机理以及涉及的微生物。着重讨论了废水处理过程中影响DNRA过程的潜在因素,包括溶解氧、碳源种类、氮源种类、碳氮比、温度、pH以及废水成分等,并对各种因素如何调控DNRA与反硝化过程之间的竞争进行了总结分析。功能基因定量和15N同位素示踪技术的应用可为我们更好地研究DNRA过程提供技术支持。综上,本文综述了DNRA过程在废水处理中的发生机制及其贡献,对未来DNRA过程的深入研究及废水中氮的去除或回收具有重要意义。

    Abstract:

    There are many ways of nitrogen transformation in wastewater treatment, among which dissimilatory nitrate reduction to ammonium (DNRA) convert NO3-/NO2- into NH4+, which is an important part of nitrogen transformation. This paper reviews the two-step reaction mechanism of DNRA process and microorganisms involved. In addition, the potential factors affecting the DNRA process in wastewater treatment, such as dissolved oxygen, types of carbon or nitrogen sources, C/N ratio, temperature, pH and special substances contained in wastewater, are emphatically discussed to explore how to regulate the competition between DNRA and denitrification. The application of quantitative functional genes and 15N tracing techniques provides technical support to better study the DNRA process. In general, this paper confirmed the occurrence and contribution of DNRA process in wastewater treatment, and the in-depth study of DNRA is of great significance for the removal or recovery of nitrogen in wastewater.

    参考文献
    相似文献
    引证文献
引用本文
相关视频

分享
文章指标
  • 点击次数:372
  • 下载次数: 0
  • HTML阅读次数: 0
  • 引用次数: 0
历史
  • 收稿日期:2021-02-05
  • 最后修改日期:2021-03-19
  • 录用日期:2021-04-13
文章二维码