Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Chapter 4: Activated Sludge Modelling - IqTMA-UVa Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Influence of nbVSSAn amount of non biodegradable, also called inert, VSS is introduced intothe reactor in the WW. This amount is not degraded biologically andtherefore, at a steady state, the nbVSS concentrations in the effluentand reactor are similar to the nbVSS concentration in the influent (X 0,i )The total mass of VSS in the Bioreactor includes the biomass produced(r g ), the nbVSS introduced (X 0,i ) and the debris released from theendogenous decay:QX 0S 0VrXrSrQXS14
Influence of nbVSSr VSS = total VSS production rate = r g + QX o,i /V + f d (k d )Xr g = -Yr su – k d X = biomass production from bCOD (-Yr su) minus endogenousdecay (k dX)f d (k d )X = rate of cell debris production with f d= fraction of biomass remainingas cell debris. The cell debris production is directly proportional to thebiomass concentration and k dQX o,i /V = Amount of nbVSS in the influent (Q = influent flow rate, X 0,i= influentnbVSS and V = reactor volume).15
- 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 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 42 and 43: 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
Influence of nbVSSAn amount of non biodegradable, also called inert, VSS is introduced intothe reactor in the WW. This amount is not degraded biologically andtherefore, at a steady state, the nbVSS concentrations in the effluentand reactor are similar to the nbVSS concentration in the influent (X 0,i )The total mass of VSS in the Bioreactor includes the biomass produced(r g ), the nbVSS introduced (X 0,i ) and the debris released from theendogenous decay:QX 0S 0VrXrSrQXS14
Change language