TORAY MBR
Instruction Manual
06-G-MB2-NHPAC-220801
8 of 61
When it is obvious that a module part is worn and potential for failure is high,
promptly replace that part with approved replacement parts.
Never expose the “NHPA Series” to freezing temperatures at any time.
Take measures to keep the membrane elements wet when removing the
“NHPA Series” module from the activated sludge for inspection or
maintenance. Allowing the membrane elements to dry out will adversely
affect the membrane’s permeability.
The air scour should be stopped when the filtration process is suspended.
There are two exceptions:
1) Do not stop the air scour during the normal relaxation period.
2) Do not stop the air scour if the activated sludge requires air for normal
metabolic processes. However, under these conditions the amount of air
flow directed to the diffuser should be reduced to just the amount required to
maintain sludge viability.
Once a filtrate tube has been removed or disconnected from either the
element nozzle or filtrate manifold, it should be replaced with a Toray
approved replacement part. Old filtrate tubes lose their elasticity, and the
integrity of the seal can be compromised.
Never use a pressure washer machine when washing the membrane
module and element which can cause fatal delamination of membrane
element edge.
3. Safety Instruction for Chemical Cleaning of Element
Chemical agents used for chemical cleaning can be harmful to one’s health.
Wear protective goggles, protective gloves, and other safety gear when
handling chemicals. Make sure to check the details of its material safety
data sheet (SDS) beforehand.
If chemicals come in contact with your skin or clothes, immediately wash the
contacted area with a large volume of running water.
If chemicals splash into your eyes, immediately flush with large volumes of
running water and contact a doctor.
Immediately stop the chemical cleaning operation if any of the associated
cleaning equipment appears to be malfunctioning.
