GIRE-097-2-2
36
3. Basic Control Philosophy
Listed below is the basic control philosophy for operating “TMR090 Series”. Please note that
this is a basic one and detailed control philosophy for each project shall be examined
carefully on a case-by-case basis.
(1) Suction pump: Run intermittently by timer (9 min on/1 min off), VFD control for flow rate,
stop filtration by low MBR tank level or high TMP. It will never run when no air comes to
MBR tank, and to ensure enough sludge mixing when restarting, pump is allowed to run
after one minute delay from starting MBR air flow. It will stop during air diffuser cleaning.
(2) Membrane scouring blower: 24/7 continuous operation except in the case of long
operation stop by no feed or low membrane submerged tank water level (in that case, 5
min per hour intermittent aeration).
(3) Membrane submerged tank water level: Low -> stop filtration for membrane protection,
High -> stop wastewater feed.
(4) TMP: High (+5kPa from initial) -> Alarm for chemical cleaning, High High (20kPa or
above) -> Alarm, then stop filtration.
