Chapter 4: Activated Sludge Modelling - IqTMA-UVa

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Organic matter biodegradationAerobic Growth of heterotrophic biomass: Monod Kineticsˆ H1 ˆ2HH ˆHSSK SSSK SS S H: Heterotrophic biomass growth rateˆ H: Maximum specific rate for heterotrophic biomassK S : Half saturation constantIt provides and indication ofthe affinity of the biomassfor the substrateReadily biodegradable material (rbCOD = S S) is the only substrateParticulate matter must undergo a hydrolysis step before uptake78
Organic matter biodegradationSlowly biodegradable substrate hydrolylis (ρ 7 )XSSS 11 7khKX X XSBHXXSBH KOHSO SO hKKOHOH SO KNOSNO SNO XBHAssumptions:Extracellular (enzyme dependent: Xs/X BH ).Takes place both in aerobic and anoxic conditions (but at different rates)79
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Solving the Exponential ModelBy sol
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Endogenous decayIf part of the biom
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Continuous Treatment in wellmixed r
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ExerciseThe growth of a strain of L
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Maximum Dilution Rate: DmaxCell con
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Influence of nbVSSAn amount of non
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Influence of nbVSSFraction of activ
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Biomass retentionCell washout is mo
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AerationSurfaceDiffused$$$ Aeration
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Many configuration possible!The A2/
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OverviewApplicationCostsAdvantagesD
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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 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 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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