Mbr - Recommended Biological Operational Conditions - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

6.2.1.2 MBR – Recommended Biological Operational Conditions
Parameter
MLSS (mg/L)
Temperature (°C)
pH (s.u.)
Aeration Tank, DO
(mg/L)
Viscosity (mPa-s)
Aeration Tank to
Anoxic Tank
Recirculation
Membrane Tank to
Aeration Tank
Recirculation
F:M (kg BOD/kg
MLSS/d)
F:M (kg COD/kg
MLSS/d)
SRT
Process Troubleshooting Guide is presented in Section 7 of this O&M Manual.
newterra O&M Manual
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Recommended Range
8,000 –
10,000 15,000
15 - 35 10 – 35
6.8 - 8.5 6.0 – 9.0
≥ 2.0 1.0 – 8.0
Not applicable 0 – 300
200 –
400% 500%*
400% 200 – 600%
0.1 0.03 – 0.2
0.15 0.05 – 0.3
> 15 12 – 50
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Notes
Never operate the membranes if MLSS
< 3,000 mg/l. Sludge wasting should be
undertaken as required to maintain
target MLSS
Avoid sudden changes in temperature.
Minimum operating temperature is 15 °C
Membrane module can handle a change
in pH, however it is recommended to
keep pH between 6.8 - 8.5
This can be maintained by adjusting the
volume of air supplied to the aeration
tank
–
Only applies if an anoxic tank is
included.
*The recycle ratio is a function of
effluent NO -N/TN limit
3
–
F:M = [Flow (m 3 /d) x BOD conc (mg/l)] /
3
[Process volume (m ) x MLSS conc
(mg/l)]
F:M = [Flow (m 3 /d) x BOD conc (mg/l)] /
[Process volume (m 3 ) x MLSS conc
(mg/l)]
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