Equalisation tank

1. 7 m
Maximum
Level
Daily Fluctuating Inflow
Qin
Equalization Tank
Fluctuating
Unregulated
Outflow to
Primary
Settling Tank
Qout = Qin
The Entire Volume of Tank is the
Active Storage Available
During Normal Operation
Bottom Drain
for Maintenance
Mixed
Tank

2. 1 m
Minimum
Level
7 m
Maximum
Level Overflow
to be operated after
legal permission in the
events of emergency,
failures, as bypass or
after accidental spills
PUMP
Level
Control
Constant Flow to
Primary Settling Tank
Minimum Storage Volume Maintained
at the Bottom of Tank below Pumping Level
Equalization Tank
Pump
Forced
Off
Forced
On
Bottom Drain
for Maintenance
Mixed
Tank
Daily Fluctuating Inflow

3. Forced On
(Highest
Permitted Level)
Forced Off
(Lowest
Permitted Level)

4. 1 m
Minimum
Level
7 m
Maximum
Level
Overflow
to be operated after
legal permission in the
events of emergency,
failures, as bypass or
after accidental spills
Fluctuating
Gravity Inflow PUMP
Control
Constant
Flow to
Primary
Settling Tank
Dead Storage at the Bottom
Pumped Out During Maintenance
Equalization Tank
Pump
Forced
Off
Forced
On
Bottom Drain
for Maintenance
Mixed
Tank

5. 1 m
Minimum
Level
7 m
Maximum
Level
Fluctuating
Gravity Inflow
Forced
On
Dead Storage at the Bottom
Pumped Out During Maintenance
Equalization Tank
Fluctuating
Unregulated
Outflow to
Primary Settling
Tank
Bottom Drain
for Maintenance
Mixed
Tank

6. 1 m
Minimum
Level
7 m
Maximum
Level
Fluctuating
Gravity Inflow
Forced
On
Dead Storage at the Bottom
Pumped Out During Maintenance
Equalization Tank
Fluctuating
Unregulated
Outflow to
Primary Settling
Tank
Bottom Drain
for Maintenance
Mixed
Tank