Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Chapter 4: Activated Sludge Modelling - IqTMA-UVa
Chapter 4: Activated Sludge Modelling - IqTMA-UVa
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Endogenous decayIf part of the biomass produced is degraded, r g = - Yr su is no longer true!With endogenous decay: r g = -Yr su – k d XWith k d = endogenous coefficient decay (d -1 )r g = Volumetric biomass production rate (g VSS/m 3 d)-Yr su = Rate of biomass production from substrate consumptionk d X = Rate of biomass consumption by endogenous respirationAnd = m S/(K s + S) - k dNote that r su is unchanged!!!!!r su = -r g /Y – k d X/Y = -Y -1 (X + k d X) = - max SX/(Y(K s + S))6
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