A novel method of simultaneous NH4+ and NO3- removal using Fe cycling as a catalyst: Feammox coupled with NAFO

作者：Li, Xiang^*; Yuan, Yan; Huang, Yong; Liu, Heng-wei; Bi, Zhen; Yuan, Yi; Yang, Peng-bin

来源：Science of the Total Environment, 2018, 631-632: 153-157.

DOI：10.1016/j.scitotenv.2018.03.018

• Feammox
• Nitrate-dependent Fe(II) oxidizing process (NAFO)
• Anammox
• Fe cycling
• Catalyst

The feasibility of using Feammox coupled with nitrate-dependent Fe(II) oxidizing (NAFO) to cause the simultaneous conversion of NH4+ and NO3- was explored by inoculation with Feammox sludge and the use Fe cycling as catalyst. After 61 days operation, the simultaneous conversion of NO3- and NI-Li occurred with the presence of interconversion between Fe(III) and Fe(II). The conversion ratio of NH4+ to NO3- stabilized at 0.9-1. The results of isotopic tracing and microbial diversity analysis indicated that NH4+ was first oxidized to NO3- by Fe(III), then NO3- was reduced to NO2- and N-2 by the Fe(II) produced in Feammox process, and finally, the NO(2)(-)produced in NAFO process underwent an Anammox process with the remaining NI-Li to yield N-2. The results showed the simultaneous continuous conversion process of NO3- and NH4+ with limited Fe as a catalyst was a coupled process of Feammox, Anammox, and NAFO under the anaerobic conditions.

• 出版日期2018-8-1
• 单位苏州科技大学