Foaming - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

7.5.3.2 Foaming

Condition
Excessive foaming
(white foam
accumulating over
the liquid surface)
in aeration and/or
membrane tanks
newterra O&M Manual
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Possible Cause
Influent
inhibition/biomass
toxicity occurs
MBR system is
overloading
Mixed liquor
characteristics are not
within proper operating
standards
Membrane air scour
system is over aerating
Foam control strategies
are not operating
correctly
MBR system are
undergoing start-up
1291 California Avenue, Brockville, ON K6V 5W3
Potential Remedies
Check the quality and contents of the flow into
the MBR system for any abnormal or
prohibited substances
Check the flow rates, BOD/COD loading and
F:M ratio and then reduce flow/loading and/or
increases MLSS concentration accordingly
Improve the operating conditions of the
activated sludge system
Review operation of the membrane scour
system
Review foam removal equipment, anti-foam
chemical dosing system (if applicable)
Remove foam and use approved defoamer as
necessary (consult newterra Ltd);
Control foam and ensure sprayer pump is
running at all time during start-up,
Ensure that MLSS concentration is increased,
after start-up is completed
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(800) 420-4056 / www.newterra.com
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