Chapter 4: Activated Sludge Modelling - IqTMA-UVa

More documents

Recommendations

Info

Processes for Biological NitrogenRemoval: Post-anoxicPost-anoxic denitrification can be carried out in a two-sludge processusing an external C source (typically methanol)An SRT of 5 days is normally used. Effluent N < 3 mgN/LThe anoxic tank is followed by a short aeration time of 10-20 min torelease the N 2bubbles entrapped in the MLVSSHigh operation costs!!!The process is designed based on methanol denitrification kinetics52
Processes for Biological NitrogenRemovalComputational steps for a correct design of a postanoxic process withexternal C source addition1. Determine the amount of N-NO 3-to be removed Q([NO 3-influent] – [NO 3-effluent])2. Select an anoxic tank SRT (typically 5 d)3. Calculate the residual methanol concentrations in the effluentS = K s(1 + (k d)SRT)/(SRT(µ m– k d) – 1)4. Calculate the methanol dose (methanol required for N-NO 3-reduction +methanol in the anoxic tank effluent[CH 3OH] required= bCOD + [CH 3OH] effluent= 2.86[N-NO 3-]/(1-1.42Y n)+ [CH 3OH] effluentin gram of COD/m 35. Calculate the total amount of methanol required = Q [CH 3OH] required6. Calculate the TSS productionP MLSS=[ r gHV (Heterotrophic X) + r gNV (Nitrifying bacteria) + r dV (debris) +QX 0,I(nbVSS)]/0.85 + Q (TSS o-VSS o)7. Determine the V Anoxfrom the TSS production and SRT53
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 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

Chapter 4: Activated Sludge Modelling - IqTMA-UVa

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?