Aerobic Zone
Anoxic
Zone
Final Settlement
Tank
Activated Sludge Plant Lanes
Aeration
Blowers
Aeration
Headers
P
Pressure
Monitor
P
Pressure
Monitor
Dissolved
Oxygen
Monitor
Dissolved
Oxygen
Monitor
MLSS
Monitor
Ammonia
Monitor
F
Airflow
Monitor
F
Return
Activated
Sludge
Flow Meter
Return
Activated
Sludge
Solids
Meter
F
Surplus
Activated
Sludge
Flow Meter
Ammonia
Monitor
Sludge
Blanket
Monitor
Return Activated
Sludge Pumping Station
Fig. 4
A typical conventional activated sludge plant control system
132
O. Grievson