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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Expression of XX can be obtained from S mass balance:VdS/dt = Q 0 S 0 – (Q e S e + Q w S w ) + r su V = 0With the assumptions that S = S w = S e = S r (S = bsCOD) and since (Q e+ Q w) = Q 0 , this becomes:Q 0 (S 0 – S) = -r su VSince r g = -Yr su – k d X; r g = µX = X/SRT and HRT = V/QX = (SRT/HRT) Y(S 0 – S)/(1 + (k d )SRT)29
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