Simulation in Activated Sludge Process

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Simulation in Activated Sludge Process

• By
• Mr.Abhijit A.Patil (EVA997153)
• Mr.Vichean Sivapornpun (EVA997017)
• Mr.Mohd Rashidul Hassan (EVE997226)

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Objectives

• To study processes in Activated Sludge process
  and to create simulate model for Substrate
  Utilization and Biomass Growth in Aeration Tank
  by using Monod kinetic , Substrate Balance and
  Biomass Balance
• To study effect of control parameters and
  characteristics of wastewater in Substrate
  Utilization and Biomass Growth by using the
  simulation program
• To study effect of Toxic compound on Biomass
  growth rate

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Scope of Works

• 1. Processes
• 1.1 Removal of Carbonaceous organic matter
• 1.2 Removal of Nitrogen by Nitrification
• 1.3 Effect of Toxic compound on Biomass growth
  rate
• 2. Reactor system Continuous-Flow Stirred-Tank
  (CFST)
  

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Continuous Flow Stirred Tank
Qw
SST
Influent Q ,Xo, So
Aeration Tank X, V
Effluent Qe,Xe
Return sludge line
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BOD Removal Equations By taking balances across
whole system for a continuous system we found
the following equations
Biomass balance
Substrate balance
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Hypothetical Case StudyTourist City
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Predict the Effluent BOD
eff BOD 35.4 mg/l
eff BOD 15 mg/l
eff BOD 20 mg/l
Summer
Rainy
Winter

• Reduce the Sludge Wastage Rate By
• Increasing Mean Cell Residual Time

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Nitrogen Removal EquationsBiomass Balance
Nitrosomonas Bacteria
Nitrobactor Bacteria
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Substrate Balance
NH3-N Balance
NO2-N Balance
NO3-N Balance
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Equations
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Effect of Toxic compound on BOD Removal

• Depends on compound that is trace organic Heavy
  Metal, Light Metal, etc.
• Microbial growth kinetic can be explained by
  Haldane Equation, Oslislo and Lewandowski,etc.

According to Haldane Equation
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Vissim