零价铁与微生物耦合系统强化农田排水脱氮效果研究
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

X592

基金项目:

国家自然科学基金(51779073,51379057)


Enhanced degradation of nitrogen in agricultural drainage by integrated zero-valent iron and microbiological treatment system
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 文章评论
    摘要:

    针对农田排水具有TN含量高、碳源低的特点,采用传统活性污泥法处理不能取得良好的效果,而单一零价铁脱氮存在反应中产生NH+4-N等问题,提出将两者结合,建立零价铁与微生物耦合系统处理农田排水,并实验研究零价铁与微生物耦合系统脱氮的特性以及系统脱氮效率的影响因素,分析零价铁与微生物耦合系统脱氮的机理。结果表明,在初始TN质量浓度为15 mg/L时,铁刨花与微生物耦合系统脱氮效率更高;酸洗能够增加零价铁表面反应面积,提高脱氮效率;铁刨花最佳投加量为15 g/L;零价铁与微生物耦合系统脱氮的最佳水力停留时间是12 h;耦合系统脱氮的最佳pH范围为6.0~7.5;耦合系统脱氮的最佳温度为35℃左右。

    Abstract:

    Owing to the characteristics of high nitrogen content and low carbon sources, the treatment of traditional activated sludge is not satisfactory, such as the reaction of ammonia nitrogen. Therefore, combining the two method, the system of the zero-valence iron and the microbial coupling system is formed. In this paper, based on the experiment, studies the zero-valent iron and characteristics of the microbial nitrogen coupling system and the influence factors of system efficiency of denitrification, and analyzed by scanning electron microscopy(sem)is zero-valent iron and the mechanism of microbial nitrogen coupling system. The result shows that the iron planer and the microbial coupling system are more efficient in denitrification when the initial total nitrogen concentration is 15 mg/L. Pickling can increase the surface reaction area of the zero-valence iron and improve the efficiency of denitrification. The optimum dosage of iron planer is 15 g/L, the optimum water retention time for the iron and microbial coupling system is 12 h, the optimum pH for the coupling system ranges from 6. 0 to 7. 5, and the best temperature is about 35 ℃ for coupled system denitrification.

    参考文献
    相似文献
    引证文献
引用本文

王超,周青,侯俊,等.零价铁与微生物耦合系统强化农田排水脱氮效果研究[J].水资源保护,2018,34(2):1-6.(WANG Chao, ZHOU Qing, HOU Jun, et al. Enhanced degradation of nitrogen in agricultural drainage by integrated zero-valent iron and microbiological treatment system[J]. Water Resources Protection,2018,34(2):1-6.(in Chinese))

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2017-11-29
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2018-03-27
  • 出版日期: