Chapter 2 Filtration and Membrane Scour Aeration
STERAPORE 5600 Series (FF) Instruction Manual
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2-2
Membrane Scour Aeration Devices
The aeration flow rate for module cleaning is 75 to 150 Nm
3
/(m
2
•h) (standard aeration flow rate: 125
Nm
3
/(m
2
•h))*.
*
Calculated based on the area to be aerated (upflow section).
Refer to Table 2-1 for the aeration rate for each module.
With integrated MBR systems the amount of air required to clean the module must be aerated from
the bottom of the module. If there is not enough air for biological processing, aerate in a location
where swirl flow is not inhibited.
We recommend establishing means (an air flow meter and blower manometer) for monitoring the
state of aeration.
WAR N I N G
Suspend filtration when aeration is stopped.
C AU T I O N
Use the product within the standard aeration flow rate range, as continued aeration above 150
Nm
3
/(m
2
•h) or greater may result in damage to elements.
If the same blower is used for both biological processing and membrane scour aeration, control
the volume of membrane scouring air at the constant, specified value.
In the filtration process, continue aeration even during suction relaxation time.
Take care when setting conditions below the standard aeration flow rate as the membrane can
easily become clogged.
As the aeration flow rate may be raised to strengthen membrane scouring, install the blower so
that an aeration flow rate of 150 Nm
3
/(m
2
•h) can be guaranteed.
Table 2-1
List of the Aeration Rate for Module Cleaning (unit: Nm
3
/min/module)
Module model number
56M0400FF
56M0800FF
56M1200FF
56M1600FF
56M2400FF
Number of elements
10
20
30
40
60
Minimum aeration rate
0.8
1.5
2.2
2.9
4.4
Maximum aeration rate
1.7
3.1
4.5
5.9
9.0
Standard aeration rate
1.5
2.7
3.8
5.0
7.7
Minimum aeration rate : Aeration flow rate of
75 Nm
3
/(m
2
•h)
Maximum aeration rate: Aeration flow rate
of 150 Nm
3
/(m
2
•h)
Standard aeration rate: Aeration flow rate
of 125 Nm
3
/(m
2
•h)