02050Pasveer4BODSSNPSBRUnitankCASSA2OAOlOxidationDitchContinuousLoopReactor1920SheffieldTNO50Voorschoten4Pasveer607m3CNPC.200022.17028Vol.26No.ll200020SBRICEASABA0A20ABAdsorption-Biodegradation70ABSBR20A0A20B0D2.2NPSBRCASTUnitankDVRTDSSBMTSB0AT3SBRUnitankUnitankAF1SBRfa2SRT—XV!XAFAF!11SRT—VXTfaQWXrfa!12XmgLVm3!XkgdQWm3dXrmgLAFfaVol.26No.ll20002911058%!a=3+8+38+8+8100%0.4037.5%!a=3+38+8100%SBR1SRT2ICEAS50%344.1CombinedOxidationDitchesPasveer1954Voorschoten36080100%12BOD5SS90%!95%COD85%34564.2198792UnitedIndustriesInc.BOATArmcoBMTSEIMCOCarrouselLakesideLightninEnvirex4.310000m3d1!!!110.5m4.5m30Vol.26No.ll2000!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1000mm9m245kW7.5kW20.75kW12.2kW115000m3dVR1m3600!8000.20!0.25kWh0.3!0.5m24.41..199925312!152...199810281!2843.Unitank.1998241116!194.CASS.199925115!85..200026319!216CFForster.thehistoricaldevelopmentofoxidationditch.oxida-tionditchesinWastewatertreatment.chapter140004502365120773o687042472000413060%!70%Vol.26No.ll20003l