Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Chapter 4: Activated Sludge Modelling - IqTMA-UVa Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Processes for BOD Removal andNitrificationD) Low-Cost Systems: operated at long SRT High Tank VolumesSuitable for Small communities where land is not a limitationSRT 15-40 days / HRT 15-30 hE) Sequential Batch SystemsOnly 1 bioreactor used3 h fill 2 h aeration 0.5 h settling 0.5h withdrawal2 bioreactors operated simultaneouslyNo need for secondary settlerSRT 10-30 days / HRT 15-40 h42
Processes for Biological NitrogenRemoval4 main categories:• Preanoxic configuration: Wastewater and RAS meet in the Preanoxictank. Nitrate is recycled from the aerobic compartment. Electron donor isinfluent BODRate of Denitrification affected by rbCOD, [MLSS], and T• Postanoxic Configuration: Anoxic zone follows aerobic zoneThe electron donor can be either an external Csource (typically methanol) or lysis substratefrom endogenous respiration of activatedsludge (in this last case denitrification is 3-8times slower than preanoxic denitrification43
- Page 4 and 5: Solving the Exponential ModelBy sol
- Page 6 and 7: Endogenous decayIf part of the biom
- Page 8 and 9: Continuous Treatment in wellmixed r
- Page 10 and 11: ExerciseThe growth of a strain of L
- Page 12 and 13: Maximum Dilution Rate: DmaxCell con
- Page 14 and 15: Influence of nbVSSAn amount of non
- Page 16 and 17: Influence of nbVSSFraction of activ
- Page 18 and 19: Biomass retentionCell washout is mo
- Page 20 and 21: AerationSurfaceDiffused$$$ Aeration
- Page 22 and 23: Many configuration possible!The A2/
- Page 24 and 25: OverviewApplicationCostsAdvantagesD
- Page 26 and 27: Solid Retention Time (SRT)The SRT i
- Page 28 and 29: Expression of SBiomass balance:VdX/
- Page 30 and 31: Total mixed liquor VSS (MLVSS)MLVSS
- Page 32 and 33: ..and if we have nitrification??P M
- Page 34 and 35: Processes for BOD Removal andNitrif
- Page 36 and 37: Processes for BOD Removal andNitrif
- Page 38 and 39: Processes for BOD Removal andNitrif
- Page 40 and 41: Processes for BOD Removal andNitrif
- Page 44 and 45: Processes for Biological NitrogenRe
- Page 46 and 47: Processes for Biological NitrogenRe
- Page 48 and 49: Processes for Biological NitrogenRe
- Page 50 and 51: Processes for Biological NitrogenRe
- Page 52 and 53: Processes for Biological NitrogenRe
- Page 54 and 55: Processes for Biological NitrogenRe
- Page 56 and 57: Processes for Biological NitrogenRe
- Page 58 and 59: Processes for BiologicalPhosphorous
- Page 60 and 61: Processes for BiologicalPhosphorous
- Page 62 and 63: Processes for BiologicalPhosphorous
- Page 64 and 65: Activated Sludge ModelingASM nº164
- Page 66 and 67: Biological reaction kineticsMicroor
- Page 68 and 69: Model presentationMASS BALANCES:•
- Page 70 and 71: Components in ASM1Organic matter ch
- Page 72 and 73: Components in ASM172
- Page 74 and 75: Processes in ASM1Biological process
- Page 76 and 77: Organic Matter BiodegradationORGANI
- Page 78 and 79: Organic matter biodegradationAerobi
- Page 80 and 81: Organic matter biodegradationSlowly
- Page 82 and 83: NitrificationNitrification Kinetics
- Page 84 and 85: NitrificationAutotrophic biomass de
- Page 86 and 87: NitrificationSoluble organic N ammo
- Page 88 and 89: DenitrificationHeterotrophic Biomas
- Page 90 and 91: Stoichiometric Matrix90
Processes for Biological NitrogenRemoval4 main categories:• Preanoxic configuration: Wastewater and RAS meet in the Preanoxictank. Nitrate is recycled from the aerobic compartment. Electron donor isinfluent BODRate of Denitrification affected by rbCOD, [MLSS], and T• Postanoxic Configuration: Anoxic zone follows aerobic zoneThe electron donor can be either an external Csource (typically methanol) or lysis substratefrom endogenous respiration of activatedsludge (in this last case denitrification is 3-8times slower than preanoxic denitrification43
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