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

7.5.3.3 Permeate

Condition
Cloudy permeate
(The permeate
turbidity or TSS is
above the specific
setpoint)
Lower permeate flow
than expected
High TMP and lower
permeability than
expected
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Possible Cause
Faulty operation of
instrumentation
Membrane cassette
sheets are damaged
Membrane module
assembly are
damaged
Permeate piping leak
Mechanical equipment
failure
Incorrect operation of
permeate piping and
valves
Membrane sludging
Mixed liquor
characteristics are
contributing to poor
filterability
Desired operating flux
or flowrate is higher
than design
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Potential Remedies
Confirm proper operation of control systems
and instrumentation, clean, replace,
recalibrate as required
Take out membranes and visually inspect
the individual membrane sheets, and repair
or replace the membrane sheets as
necessary
Identify damaged part, e.g. leaking tube,
pipe, O-ring, gasket, and replace as
required
Identify the leak and repair as required, e.g.
tighten connections
Ensure proper operation of permeate pumps
Check permeate piping for leaks
Confirm proper operation of pretreatment
Take out membranes and visually inspect
the individual membrane sheet. Remove
sludge material from membrane sheets**
Test the filterability of the mixed liquor;
review and improve operating conditions of
the activated sludge system as necessary
Adjust operational flux or flowrate to match
the design flux or flowrate
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