Achieving deep autotrophic nitrogen removal in aerated biofilter driven by sponge iron: Performance and mechanism

Bioelectrochemically enhanced autotrophic Feammox for ammonium removal via the Fe(ii)/Fe(iii) cycle

“…Within the tolerance range of Feammox to oxygen, constant microaeration or intermittent aeration were adopted to provide a low-oxygen environment, which achieved Fe(II) oxidation and further enhanced Feammox performance. 12,13 In addition, the most frequently mentioned bioprocess is nitrate-dependent Fe(II) oxidation (NDFO). Fe(II) is oxidized by nitrate, coupled with Feammox to implement the iron cycle by supplying nitrate.…”

Editorial: Biological nitrogen removal from low carbon wastewater

“…In conventional nitrogen removal process, the deep nitrogen removal was realized by nitrification and denitrification for low carbon wastewater with external organic carbon addition, which would lead to higher cost, excessive sludge production and also greenhouse gas emission (Li et al, 2022). Carbon neutrality is an unprecedented challenge for the world, it is particularly necessary to invent innovative and economic process for nitrogen removal from low carbon wastewater (Bae and Kim, 2021;Rui and Peng, 2021).…”