A　novel　electrolysis-integrated　anammox　(Ele-anammox)　process　was　developed　for　intensified　nitrogen　removal　and　concomitant　phosphorus　recovery　from　nutrient-rich　wastewater.　By　conducting　a　parallel　experiment,　average　removal　efficiencies　of　total　nitrogen　(TN)　and　total　phosphorus　(TP)　in　Ele-anammox　reactor　reached　90.69%　and　95.02%　respectively,　showing　increases　of　7.76%　and　79.08%,　as　compared　to　the　traditional　anammox　process.　Anammox　reaction　and　synergetic　denitrification　were　mainly　responsible　for　the　reinforced　N-removal.　Successions　of　microbial　communities　revealed　that　Candidatus　Kuenenia　declined　markedly　while　Candidatus　Brocadia　was　enriched　in　Ele-anammox　system,　suggesting　that　electrical　environment　provided　Candidatus　Brocadia　with　a　competitive　advantage　over　other　anammox　bacteria.　Based　on　the　proposed　current　control　strategy　(the　applied　current　was　calculated　to　match　the　influent　P　loading),　precise　release　of　soluble　Fe2+　could　be　achieved　by　anodic　oxidation.　Various　elemental　analysis　methods,　including　the　standards,　measurements　and　testing　(SMT)　protocol,　energy　dispersive　X-ray　spectroscopy　(eSEM-EDX),　X-ray　fluorescence　spectrometry　(XRF)　and　inductively　coupled　plasma　emission　spectroscopy　(ICP-OES),　jointly　indicated　that　the　solid　phase　of　Ele-anammox　was　primarily　Fe-P　precipitation,　which　showed　a　similar　Fe:P　ratio　with　vivianite　(Fe3(PO4)2·8H2O,　1.5).　X-ray　diffraction　(XRD)　analysis　further　validated　the　in-situ　crystallization　of　vivianite,　and　semi-quantification　implied　a　vivianite　content　of　85%.　Mössbauer　spectroscopy　showed　at　least　51.48%　∼　59.11%　of　iron　was　bound　in　vivianite,　while　impurity　occupation　and　potential　oxidization　may　impair　the　purity　of　P-recovery　products,　which　should　be　concerned　in　future　practice.　©　2023