Simulation of Activated Sludge Processes

1
Simulation of Activated Sludge Processes

• By
• 1 Mr. Patil Abhijit A. (EVA997153)
• 2 Mr. Vichean Sivapornpun (EVA997017)
• 3 Mr. Mohd.Rashidul Hasan(EVE997226)

2
Purpose

• To predict effluent microorganism and substrate
  concentration under the different sets of
  conditions

Q,S,X
Q,S0
X, V, S
Activated Sludge Process without recycle
3
Approach

• By taking substrate balance across system .

Simplified word statement Accumulation
Inflow - Outflow Net growth
Symbolic representation dX Vr QX0
- QX Vr r g

dt
..And keeping all the kinetic coefficients in
the particular equation constant varying mean
cell residence time.
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Equation adopted

• After taking substrate balance and biomass
  balance
• X m (S0 -S) Y(S0 -S)

K(1Kd ?)
(1kd ?)
Effluent biomass concentration
S Ks(1Kd ?)
?(YK-Kd)-1
Effluent substrate concentration
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Ultimate Goal
S mg/l
Effluent substrate conc.
Mean cell residence time
?c d