Limited　filamentous　bulking　(LFB)　combined　with　nitritation　under　low　dissolved　oxygen　(DO)　is　a　new　technology　for　enhancing　nitrogen　removal　and　reducing　aeration　requirements.　In　order　to　investigate　the　feasibility　and　sustainability　of　this　technology,　two　sequence　batch　reactors　(SBRs)　were　operated　under　different　regimes　to　stimulate　different　aeration　modes　under　low　DO　(0.3-0.8　mg•L-1).　Sludge　settleability,　nitrite　accumulation　ratio　(NAR),　total　nitrogen　(TN)　removal　rate,　dynamic　variation　of　dominant　filaments,　and　nitrifying　bacterial　communities　were　investigated.　The　results　indicated　that　short-cut　nitrification　combined　with　LFB　could　be　achieved　under　intermittent　aeration,　and　the　ratio　of　anoxic/aerobic　was　15　min/30　min,　the　value　of　sludge　volume　index　(SVI)　was　maintained　from　170　mL•g-1　to　200　mL•g-1.　An　NAR　above　95%　was　achieved　under　real-time　continuous　aeration.　Meanwhile,　LFB　was　induced　when　nitrite　started　to　accumulate,　and　the　dominant　filament　was　Type　0092.　However,　the　limited　bulking　was　not　maintained　for　the　long　term.　After　a　transfer　from　continuous　aeration　to　intermittent　aeration,　LFB　reappeared　in　60　days　and　the　value　of　SVI　remained　between　170　mL•g-1　and　200　mL•g-1.　The　process　of　nitritation　combined　with　LFB　was　maintained　stably　for　the　next　two　months,　and　the　TN　removal　rate　was　above　66%.　FISH　analysis　indicated　that　the　identical　dominant　filaments　were　M.　parvicella　and　Type　0092　for　maintaining　limited　bulking　in　the　two　reactors.　qPCR　results　showed　that　proportion　of　AOB　in　the　total　bacteria　increased　from　the　previous　0.53%　to　2.19%　in　the　end,　whereas　that　of　NOB　decreased　from　17.5%　to　3.2%　in　SBR　A.　Moreover,　the　proportion　of　AOB　increased　from　0.51%　to　1.53%,　whereas　that　of　NOB　decreased　from　18.05%　to　11.01%　in　SBR　B.　©　2018,　Science　Press.　All　right　reserved.