To　date,　studies　on　the　effect　of　sewage　disturbances　on　treatment　facilities　were　based　on　fixed-length　flow　variations,　which　are　incapable　of　imitating　the　actual　dynamic　flow　characteristics　of　municipal　sewage.　Here,　an　innovative　dynamic　influent　disturbance　control　system　is　established　in　this　study　and　applied　in　a　novel　denitrifying　phosphorus　removal　(anaerobic　anoxic　oxic-biological　contact　oxidation,　AAO-BCO)　system　to　simulate　seasonal　and　diurnal　sewage　fluctuations　in　laboratory-scale　experiments.　The　results　showed　that,　under　sinusoidal　influent　flow　perturbation,　the　effluent　pollutant　content　followed　a　relatively　gentle　sinusoidal　trend　and　did　not　always　result　in　desired　level　of　pollutant　removal.　The　ability　of　the　system　to　cope　with　sinusoidal　flow　variations　was　susceptible　to　the　amplitude　of　diurnal　sewage　fluctuation,　while　stronger　tolerance　capacity　was　observed　to　seasonal　and　momentary　increase　in　wastewater　flowrate.　There　was　also　a　discrepancy　in　the　system　buffering　capacity　towards　various　pollutants　removal　(COD　＞　TIN　＞　PO43−),　which　may　be　attributed　to　wide　fluctuations　in　PO43−/NO3−　and　different　decrease　in　metabolic　activity　of　denitrifying　phosphorus　removal　(DPR)　sludge　caused　by　extreme　hydraulic　retention　times.　To　improve　the　robustness　and　stability　of　the　DPR　system,　a　regulating　strategy　was　proposed　to　alleviate　the　biomass　reduction　and　uncoordinated　PO43−/NO3−.　©　2023　Elsevier　B.V.