Transcription of Biological Nutrient Removal Processes
1 Biological Nutrient Removal PROCESSESD ecember 1, 2010 GeorgineGrissopPE, WuhrmanProposes 2-stage, Aerobic/Anoxic Process1957 Davidson Patent For A 2-stage, Anaerobic/Aerobic Process1962 LudzackAnd EttingerDevelop 2-stage Anoxic/Aerobic Process1967 Phostriptm, SidestreamPhosphorus Removal Process Proposed By Leven Et Al1967 Excess Biological Phosphorus Removal Reported By Connell And VackerAt San Antonio, Texas, RillingPlant1968 Barth Proposes Multiple Sludge Processes For Nutrient Removal1969 Scalf, Et. Al., Report On Excess Biological Phosphorus Removal At Baltimore, Maryland Back River Wastewater Treatment PlantBiological Nutrient Removal ProcessesMilestones1970 Savage Patents DenitrificationFilter1971 Excess Phosphorus Removal Reported At Los Angeles, California, Hyperion Plant By Bargman.
2 Et Al1973 Barnard Proposes Modified Ludzack-ettingerProcess1975 Barnard Patents BardenphotmProcess1976 Specter Patents A/OtmAnd A2/OtmProcesses1976 Bio-denitrotmProcess Patented1977 Jervis Develops Fluidized Bed Reactor For Denitrification1980 University Of Cape Town Process DevelopedBiological Nutrient Removal ProcessesHistorical Context of Phosphorus Removal In 1960 s and 1970 s several plants reported Removal of phosphorus above 80 percent What they had in common: Plug flow or compartmentalized aeration tank Inadequate aeration at head of aeration tank provided low High dissolved oxygen after low section Phosphorus release at head of tank Low SVI (less than 100 mL/gm) sludge (non-bulking) Biological Nutrient Removal ProcessesPlug -FlowBiological Nutrient Removal ProcessesA/O ProcessBiological Nutrient Removal ProcessesFermentationBiological Nutrient Removal ProcessesVolatile Fatty Acid Induced Phosphorus Removal (VIPR)
3 Biological Nutrient Removal ProcessesPhoStrip ProcessBiological Nutrient Removal ProcessesHISTORICAL CONTEXTOF NITROGEN REMOVALA ttached Growth Nitrogen RemovalBiological Nutrient Removal ProcessesLudzack-Ettinger ProcessBiological Nutrient Removal ProcessesModified Ludzack-Ettinger Process (MLE) Biological Nutrient Removal ProcessesBardenpho ProcessBiological Nutrient Removal ProcessesProgression for Nitrogen Removal OnlyLudzack-EttingerModified LudzackEttingerBardenphoBiological Nutrient Removal ProcessesStep-Feed ProcessBiological Nutrient Removal ProcessesBio-Denitro SystemBiological Nutrient Removal ProcessesCOMBINING NITROGEN AND PHOSPHORUS REMOVALThe A2O Process Combines A/O and MLE ProcessesA/OMLEA2/OBiological Nutrient Removal ProcessesModified Bardenpho ProcessBiological Nutrient Removal ProcessesProgression of BNR OptionsBiological Nutrient Removal ProcessesA2O to UCTB
4 Iological Nutrient Removal ProcessesA2 OUCTFrom UCT to VIPB iological Nutrient Removal ProcessesUCTVIPUCT and Modified UCTB iological Nutrient Removal ProcessesUCTM odified UCTStep BioP ProcessBiological Nutrient Removal ProcessesN & P Removal in Oxidation DitchBiological Nutrient Removal ProcessesWasteBNR Process PerformanceProcessNitrogen RemovalPhosphorus RemovalMLEGood (7-9TN)NoneStep Feed DNGood (7-9TN)NoneAONoneModerate (< 2 TP)A2 OGood (7-9 TN)Good (< 1 TP)Step Feed DN & bioPGood (7-9 TN)Good (< 1 TP)UCT & VIPGood (7-9 TN)Good (< 1 TP)4 Stage BardenphoExcellent (3 6 TN)None5 Stage BardenphoExcellent (3 6 TN)Good (< 1 TP)Denitrification Filter w/C feedExcellent (3 4 TN)NoneChemical AdditionNoneExcellent (< TP)Advanced ProcessesExcellent(1 TN)Excellent(< TP)
5 Biological Nutrient Removal ProcessesBNR Process EnhancementsEnhancementNitrogen RemovalPhosphorous RemovalIFASR educes needed volume w/o increasing clarifier loadNoneMBRR educes needed volume, no sec clarifiers requiredEnhanced P solids removalMedia FiltersNoneEnhanced P Solids removalCloth FiltersNoneEnhanced P solids removalBallasted ClarificationNoneEnhanced P solids removalBiological Nutrient Removal ProcessesWhat is IFAS? Biological Nutrient Removal ProcessesAS + TF(RBC) = IFASI ntegrated Fixed Film Activated SludgeNOT!The Higher capacity in same volume Increased biomass w/o increased clarifier loading Re-seeding of suspended phase Self correcting Biological Nutrient Removal ProcessesWASRAS IFASW astewater Treatment Traditional vsMembrane Bioreactor (MBR) Biological Nutrient Removal ProcessesSecondary ClarifierAerationReturn Activated SludgeSandFilterWaste ActivatedSludgeTRADITIONALMEMBRANEBIOREA CTORP ermeatePumpRaw SewageAir ScourWASP rocess AirMLSS RecycleDenite Filters Removes biosolids (contain N & P)
6 Removes P solids Denitrificationmode Add carbon source Methanol Acetate Nitrate to Nitrogen gasBiological Nutrient Removal ProcessesQUESTIONS?
