TORAY MBR
Instruction Manual
06-G-MB2-NHPAF-220801
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Make certain the air discharge valve is in the open position to assure any
accumulated air is released when first filling the membrane tank with clean
water or sludge. After the tank is filled with clean water, close the air
discharge valve.
Do not use ground water for the initial filling of the membrane tank. Ground
water may contain considerable concentrations of iron, manganese, calcium,
or silica. Naturally occurring compounds of these elements can clog the
membrane pores.
White foaming may occur in the membrane tank during clean water
operation. The foaming is caused by the leaching of residual biodegradable
hydrophilic components contained in the membrane after the manufacturing
process. Foaming is normal and does not adversely affect the membrane
filtration process but if you want to remove this, do not use silicone-based
anti-foaming agent which may cause choking of membrane pores.
Do not operate the membranes longer than necessary to purge the system
of entrained air when using clean water in the MBR tank. Prolonged clean
water operation can clog the membrane pores.
Keep the membranes wet once they get wet. If the membranes are allowed
to dry out, the permeability of the membranes may be permanently reduced.
Be sure to pass the seeding sludge through a screen to remove large
foreign materials when feeding the seeding sludge. It is recommended that
the screen mesh be 3 mm or smaller.
Make certain sufficient air is being supplied to the membrane module air
diffuser before operating in the filtration mode. Failure to do so will result in
the membrane becoming clogged.
Do not allow chemicals, toxic agents, oils, or any other substances into the
MBR tank that may adversely affect the condition of the activated sludge.
If anti-foaming agents are to be added to the membrane tank, use only
alcohol based anti-foaming products. Do not use silicone-based anti-foaming
agent which may cause choking of membrane pores.
Avoid abrupt changes to especially pH, temperature, and suction pressure
when operating in the filtration mode, even if these changes are within
acceptable operating guidelines.
