Type　0092　filamentous　bacteria　generally　do　not　result　in　excessive　sludge　bulking.　To　take　advantage　of　this,　domestic　sewage　was　used　to　inoculate　shortcut　nitrification　sludge　in　a　sequencing　batch　reactor　(SBR).　Sludge　settleability,　the　nitrite　accumulation　ratio　(NAR),　pollutant　removal　characteristics,　and　the　dynamic　variation　of　microbial　communities　during　the　system　startup　and　maintenance　were　investigated.　The　results　indicated　that　limited　filamentous　bulking　(LFB)with　Type　0092　filamentous　bacteria　combined　with　shortcut　nitrification　could　be　achieved　under　alternating　anoxic　and　aerobic　(four　times/cycle;　the　ratio　of　anoxic　/aerobic　was　20　min/60　min)　with　low　dissolved　oxygen　(DO)　content　(0.3-0.8　mg•L-1)　and　a　low　food/microorganism　(F/M)　ratio　[0.24　kg•(kg•d)-1,　COD/MLSS].　The　removal　rate　of　COD　and　total　nitrogen　(TN)　were　increased　by　13%　and　5%　when　the　sludge　volume　index　(SVI)　and　NAR　were　maintained　at　approximately　180　mL•g-1and　99%,　respectively,　and　aeration　consumption　was　reduced　by　62.5%　compared　to　general　whole-run　nitrification.　When　the　ratio　of　anoxic　/aerobic　changed　to　be　10　min　/30　min　as　alternating　times　increased　to　6　times　per　cycle,　the　activity　of　the　nitrite　oxidizing　bacteria　(NOB)　recovered,　causing　shortcut　nitrification　to　be　destroyed.　In　addition,　low　DO,　alternate　anoxic/aerobic　modes,　and　low　loading　rates　were　the　key　factors　in　achieving　LFB　with　Type　0092　filamentous　bacteria　as　the　dominant　filamentous　bacteria.　Limited　filamentous　bulking　could　not　be　maintained　under　low　DO　and　alternating　anoxic/aerobic　conditions　with　loading　rates　above　0.25　kg•(kg•d)-1,　COD/MLSS.　©　2019,　Science　Press.　All　right　reserved.