The　engineering　application　of　continuous-flow　process　for　advanced　nitrogen　removal　from　landfill　leachate　via　anammox　is　at　the　forefront　of　landfill　leachate　treatment　field.　For　the　full-scale　engineering　renovation,　the　anaerobic　+　pre-aeration　+　anammox　+　MBR　process　was　constructed　for　advanced　nitrogen　removal　from　landfill　leachate　of　150　m3/d.　Under　the　strategy　of　aeration　control　and　low　reflux　ratio,　a　stable　operation　of　simultaneous　partial　nitrification　and　denitrification　(SPND)　and　anammox　was　achieved.　Without　carbon　sources　addition,　the　nitrogen　removal　efficiency　reached　94.07　±　1.26　%,　of　which　the　nitrogen　removal　contribution　of　the　SPND　and　anammox　process　reached　64.12　±　0.92　%　and　26.46　±　1.10　%,　respectively.　The　anammox　bacteria　mainly　enriched　in　sponge　biofilm　and　floc　sludge　with　abundant　reached　2.57　%　and　2.17　%,　respectively.　Compared　with　the　original　process,　the　renovated　process　could　significantly　save　18.51　%　of　the　treatment　consumption.　This　study　provided　a　practical　and　feasible　approach　for　the　renovation　of　the　existing　treatment　process.　©　2025　Elsevier　Ltd