In　order　to　culture　nitrite　DPAOs　to　achieve　aerobic　granular　sludge　(AGS)　short-range　nitrification　and　endogenous　denitrification　and　phosphorus　removal,　three　groups　of　SBR　with　the　same　specifications　were　operate　in　anaerobic　/　aerobic　/　anoxic　followed　by　short　aeration　(AO1　A　-　O2　)　mode.　The　aeration　intensity　and　duration　of　aerobic　/　post　aerobic　(O1　/　O2　)　varied　among　the　reactor.　By　comparing　the　operational　performance　and　functional　microbial　activity　of　the　three　reactor　groups　over　a　period　of　60　days,　the　pollutant　removal　efficiency　and　activity　of　functional　bacteria　in　each　system　were　investigated.　The　results　showed　that　R2　with　short　time　hypoxia　aeration　for　10　min　and　the　DO　concentrations　of　O1　and　O2　at　5　and　2.　5　L　/　(h·L)　had　the　best　nitrogen　and　phosphorus　removal　effect,　and　the　removal　rates　of　COD,　TP,　NH4+　-　N　and　TN　reached　95.　49%,　95.　57%,　100%　and　95.　52%,　respectively.　The　optimal　environment　for　short-range　nitrification　and　endogenous　denitrification　and　phosphorus　removal　was　created　by　short-term　aerobic　starvation　and　low　dissolved　oxygen.　Approximately　60%　of　the　phosphorus　removal　bacteria　in　R2　were　DPAOs,　with　the　highst　proporton　being　nitrite　phosphatepolyphosphate　bacteria,　accouting　for　38.　76%　.　The　RNA　of　the　aerobic　phase　of　the　reactor　was　74.　19%,　which　achieved　high　NO2-　-　N　accumulation.　The　concentration　of　FNA　was　1.　03　μg　/　L,　which　inhibited　PAOs　and　NOB　while　enriching　more　AOB　and　DPAOs.　©　2024　Harbin　Institute　of　Technology.　All　rights　reserved.