Membrane Air System; Membrane Cleaning - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

7.5.3.4 Membrane air system

Condition
Uneven aeration of
membrane module
Uneven aeration in
membrane tank
Air scour rate fails to
reach the specified
values

7.5.3.5 Membrane Cleaning

Condition
Increased frequency
of cleaning
Cleaning fails to
recover flux,
permeability of
membranes
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Possible Cause
Membrane diffuser
clogging;
Loose air piping
connections
Membrane diffusers or
membrane modules are
not level
Improper operation of
membrane blowers
and/or air scour system,
malfunctioning diffusers
Possible Cause
Mixed liquor
characteristics are
contributing to poor
filterability
Improper operation of
membrane cleaning
Membrane operate at
higher flux than
designed
Improper operation of
membrane cleaning
Improper operation of
permeate pumps,
piping, and control
valves
Irrecoverable fouling
of membranes
1291 California Avenue, Brockville, ON K6V 5W3
Potential Remedies
Wash or clean the diffusers
Tighten pipe connections
Level the equipment
Repair or replace the blowers
Review and repair air piping as
necessary
Repair the diffusers
Potential Remedies
Test the filterability of the mixed liquor
Review and improve operating conditions
of the activated sludge system as
necessary
Confirm cleaning is done correctly, such as
controls, cleaning cycles or durations,
chemical concentration, and dosing system
Review MBR flow records
Confirm cleaning is operated correctly,
such as controls, cleaning cycles or
durations, and chemical concentration etc.
Repair equipment as necessary
Review operating history with the goal of
identifying contributing factors to fouling;
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