Effect of Iron on Anammox Process and Microbial Community: A Review

Abstract:

This paper reviews the effects of iron on anammox process from the perspectives of electron transfer mechanism, microbial activities, and influencing factors. The results show that the iron with different valence statesas electron acceptor or electron donor canpromoteanammox by generating substrate and producing different reactions, such as Feammox and nitrate-dependent ferrous iron oxidation (NAFO). Meanwhile, iron element can promote the enrichment of functional microorganisms, the increase of heme c, and the granulation process, thus obviously improving the treatment effect of Anammox process. This paper also summarizes the optimal parameters such as iron dosing state, temperature, and pH in the process of iron-enhanced Anammox, which can provide reference for future study of iron-enhanced anammox.