Chapter 4: Activated Sludge Modelling - IqTMA-UVa

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OverviewApplicationCostsAdvantagesDisadvantagesOrganic chemical, textile, municipal sewage,steel, pulp and paperOperating 0.16 - 0.8 $ /m 3 , capital 500 - 1,900 $/(m 3 -d) for flow rates of 100 - 1,000 m 3 /dSimple to start up and operate, manyconfigurationsHigh sludge production, dependent on settlingOrganic loading0.3 - 3 kg BOD/(m 3 -d)HRT4 - 8 h (municipal)BOD removal85 - 95% (municipal)Source: Environmental Biotreatment. CN Mulligan.This is given as an example only, very specific of North America24
OverviewDissolved O 2> 2 mg/L; DO > 4 mg/L increase aeration costsQ w4000-12000 mg/LQ r /Q 00.5-0.75<strong>Sludge</strong> blanketHeight (º/ 1 )0.1Typical OperationProblem<strong>Sludge</strong> bulking due to the growth of filamentousbacteriaSource: Environmental Biotreatment. CN Mulligan.This is given as an example only, very specific of North America25
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 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 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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