To　quickly　realize　the　autotrophic　denitrification　of　actual　domestic　sewage　in　the　short　term,　the　activated　sludge　from　the　actual　sewage　treatment　plant　containing　anammox　bacteria　was　used　to　study　the　removal　effect　of　nitrogen　in　the　process　of　hypoxia　aeration　for　Fe2+/Fe3+　and　Mn2+.　The　results　showed　that　both　Fe2+/Fe3+　and　Mn2+　can　increase　the　abundance　of　anammox　bacteria　(AnAOB)　in　activated　sludge,　but　Fe2+/Fe3+　had　a　certain　inhibitory　effect　on　ammonia　oxidizing　bacteria　(AOB);　therefore,　the　total　inorganic　nitrogen　removal　rate　was　25%　in　the　presence　of　Fe2+/Fe3+　under　short-term　dosing,　but　the　total　inorganic　nitrogen　removal　rate　was　44%　in　the　presence　of　Mn2+.　Nitrogen　balance　analysis　showed　that　nitrogen　transformation　was　mainly　denitrification　under　the　condition　of　Fe2+/Fe3+;　but　was　mainly　anaerobic　ammonium　oxidation　(anammox)　process　under　the　condition　of　Mn2+.　Therefore,　the　anammox　activity　could　be　enhanced　in　traditional　activated　sludge　by　short-term　addition　of　Mn2+,　promoting　the　removal　of　nitrogen　during　the　low-oxygen　aeration,　and　facilitating　the　rapid　achievement　of　integrated　autotrophic　nitrogen　removal.　©　All　Right　Reserved.