In　order　to　explore　the　stability　of　the　completely　autotrophic　nitrogen　removal　over　nitrite　(CANON)　process　and　the　setting　of　related　parameters　in　the　intermittent　starvation　based　on　hydraulic　screening,　sequencing　batch　reactor　(SBR)　was　used　for　the　CANON　process.　Flocculent　sludge　was　periodically　discharged　through　hydraulic　screening,　and　intermittent　starvation　was　performed　on　it　to　inhibit　the　growth　and　reproduction　of　nitrite-oxidizing　bacteria　(NOB).　The　adjustment　of　two　parameters　(sedimentation　time　and　starvation　period)　was　investigated　to　realize　the　stable　operation　of　CANON　process.　Experimental　results　show　that　sedimentation　time　had　great　impact　on　the　particle　size　distribution　and　functional　bacteria　activity.　A　sedimentation　time　of　more　than　1.5　min　could　basically　retain　the　ANAMMOX　bacteria　in　the　reactor.　Ammonia-oxidizing　bacteria　(AOB)　were　distributed　in　flocculent　sludge　and　granular　sludge,　and　NOB　was　mainly　distributed　in　the　flocculent　sludge　with　low　mass　transfer　resistance.　The　activity　decay　rate　of　AOB　during　hypoxic　starvation　remained　basically　stable,　while　NOB　was　more　sensitive　in　the　face　of　hypoxic　starvation,　and　the　activity　decay　rate　of　NOB　was　greater　than　that　of　AOB.　In　the　recovery　phase,　since　AOB　has　a　unique　mechanism　to　deal　with　starvation　that　it　can　keep　the　cells　in　a　state　of　oxidizing　NH4+-N　at　the　maximum　rate　immediately　after　experiencing　a　short-term　starvation,　it　could　reach　the　substrate　degradation　rate　of　0.097　g/(g·d)　when　the　inlet　water　has　been　fed　for　3　d,　which　was　86%　of　the　pre-starvation　rate.　However,　NOB　could　not　quickly　adapt　to　the　changes　in　the　environment,　causing　its　activity　recovery　rate　to　lag　behind　AOB.　When　the　reactor　was　operated　in　the　mode　of　4　d　starvation　and　3　d　recovery,　NOB　was　effectively　suppressed　that　the　NO3--N　in　the　effluent　showed　a　downward　trend.　Afterwards,　the　intermittent　starvation　period　was　adjusted　to　4　d　starvation　and　5　d　recovery,　which　improved　the　activity　of　AOB　and　the　treatment　effect　was　further　enhanced.　Entering　the　stable　stage,　the　average　values　of　effluent　NH4+-N　and　NO3--N　were　2.69　and　7.79　mg/L　respectively,　and　the　removal　rates　of　ammonia　nitrogen　and　total　nitrogen　reached　96%　and　79%　respectively.　The　use　of　hydraulic　screening　and　intermittent　starvation　CANON　process　to　treat　low-ammonia　nitrogen　wastewater　has　stable　operation　performance,　and　the　effluent　meets　the　first-level　A　standard　specified　in　the　Discharge　Standard　of　Pollutants　for　Municipal　Wastewater　Treatment　Plant　(GB　18918-2002).　Copyright　©2022　Journal　of　Harbin　Institute　of　Technology.All　rights　reserved.