Achieving Ammonium Removal Through Anammox-Derived Feammox With Low Demand of Fe(III).

ABSTRACT: Feammox-based nitrogen removal technology can reduce energy consumption by aeration and emission of carbon dioxide. However, the huge theoretical demand for Fe(III) becomes a challenge for the further development of Feammox. This study investigated an anammox-derived Feammox process with an intermittent dosage of Fe₂O₃ and proposed a novel approach to reduce the Fe(III) consumption. The results showed that anammox genera Candidatus Brocadia and Candidatus Kuenenia in the seed anammox sludge significantly decreased after cultivation. The formation of N₂ was the dominating pathway in Feammox while that of nitrite and nitrate could be neglected. Batch tests showed that specific Feammox activity of ammonium oxidation was 1.14-9.98 mg N/(g VSS·d).

SUBMITTER: Hu L 

PROVIDER: S-EPMC9271925 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature