Chapter 4: Activated Sludge Modelling - IqTMA-UVa

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Processes for BiologicalPhosphorous Removal• Modified UCT process offers ahigher protection of theAnaerobic tank against thepernicious effects of Nitrate• More complex operationd) PhoStrip: Combined biological and chemical P removal• No N removal• P is released from Biomass in ananaerobic gravity settler receivingRAS• Overflow from the settler is treatedchemically with alum, lime or Fe salt•The RAS is returned to the aerobicstage62
Processes for BiologicalPhosphorous Removal☺ PhoStrip can be easily incorporated in existing AS plants☺ It can achieve [Ortophosphate] < 1 mg/L☺ Less dependent on bsCOD☻ High operation cost due to chemical use.☻ High maintenance when using LimeSRT 5-20 d; HRT anae8-12 h; HRT aer4-10 hE) Modified Bardenpho• The second anoxic stageprovides additional nitrificationRAS free of Nitrates• 3-5 mg/TN• Less efficient for P removal• Large Tank Volumes63
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Solving the Exponential ModelBy sol
Page 6 and 7:
Endogenous decayIf part of the biom
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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 44 and 45: Processes for Biological NitrogenRe
Page 58 and 59: Processes for BiologicalPhosphorous
Page 60 and 61: 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
Page 92 and 93: Conclusions• The Model works at c
Page 94 and 95: In BioWin3Bioreactor Brush aeratorS
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Chapter 4: Activated Sludge Modelling - IqTMA-UVa

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